Hoverfly
Guides
Allograpta obliqua
oblique streaktail
Allograpta obliqua is a common North American hoverfly species in the family Syrphidae. Adults are small, measuring 6–7 mm, with distinctive yellow thoracic stripes and abdominal banding. The species exhibits sexual dimorphism in eye structure: males have holoptic eyes while females have dichoptic eyes. Larvae are aphid predators, reaching 8–9 mm in length with a bumpy, slug-like appearance. The species is active year-round in southern portions of its range and has been documented across much of the continental United States, southern Canada, Mexico, Bermuda, the West Indies, and parts of the Neotropical Americas.
Anasimyia
swamp flies
Anasimyia is a genus of wetland hoverflies (Syrphidae) characterized by aquatic larval development. The genus was historically treated as a subgenus of Lejops but has been elevated to full generic status based on morphological and molecular evidence. Adults are associated with marshy and aquatic habitats. The genus includes approximately 20 described species distributed primarily across the Holarctic region.
Anasimyia chrysostoma
Lump-legged Swamp Fly
Anasimyia chrysostoma, commonly known as the lump-legged swamp fly, is a syrphid fly species distributed across the United States and Canada. Adults are flower visitors that feed on nectar and pollen. The larvae are aquatic and possess the characteristic rat-tailed morphology typical of the genus Anasimyia. The species is considered fairly common and has been documented in 355 observations on iNaturalist.
Anasimyia distincta
short-spurred swamp fly
Anasimyia distincta, known as the short-spurred swamp fly, is a rare syrphid fly species documented in the northeastern United States and adjacent Canada. Adults are commonly observed on flowers where they feed on nectar and pollen. The species belongs to a genus whose larvae are aquatic and possess the characteristic rat-tailed morphology of eristaline hoverflies.
Anasimyia perfidiosus
Treacherous Swamp Fly
Anasimyia perfidiosus is a species of hoverfly (family Syrphidae) found in North America. It was originally described in the genus Lejops and is still sometimes referenced by that synonym. The species is known by the common name Treacherous Swamp Fly. It belongs to the subfamily Eristalinae, a group of syrphid flies often associated with aquatic or semi-aquatic habitats.
Arctosyrphus willingii
northern longbeak
Arctosyrphus willingii, known as the northern longbeak, is a species of hoverfly in the family Syrphidae. It is a medium-sized fly, 11–12 mm in length, with distinctive sexual dimorphism in frons width and wing coloration. The species was formerly classified under the genus Lejops. It is restricted to boreal and subarctic regions of North America.
Baccha
Baccha is a genus of hoverflies in the subfamily Syrphinae, characterized by extremely slender, club-shaped abdomens. Adults range from 7 to 10 mm in length and exhibit wasp-like body proportions with clear or faintly marked wings. The genus is distinguished by its distinctive elongate body form among syrphine flies.
Blera
Wood Flies
Blera is a genus of hoverflies (Syrphidae) established by Billberg in 1820. The genus is primarily North American in distribution, with approximately three European species. One species, Blera fallax (pine hoverfly), has been the subject of conservation translocation efforts in Britain since 2018. A fossil species, Blera miocenica, has been described from Early Miocene deposits in the Czech Republic, representing the first known fossil record of the genus.
Blera analis
Orange-tailed Wood Fly
Blera analis is an uncommon syrphid fly found in northeastern North America. Adults are medium-sized hoverflies, 9–13 mm in length, with distinctive orange-yellow abdominal markings. The species was described by Macquart in 1842. Larvae develop in tree rot holes and feed on exuding sap.
Blera armillata
Orange-faced Wood Fly
Blera armillata is an uncommon syrphid hoverfly first described by Osten Sacken in 1875. Adults are known as flower flies and visit flowers for nectar and pollen. The species is distinguished from congeners by its entirely black abdomen, pale scutum, and black gena with a yellow face. The rat-tailed larvae develop in exuding sap or rot holes of trees.
Blera confusa
Confusing Wood Fly
Blera confusa, commonly known as the Confusing Wood Fly, is a syrphid fly species first described by Johnson in 1913. Adults are flower visitors that feed on nectar and pollen. The larvae are of the rat-tailed type, developing in exuding sap or rot holes of trees. The species is widely distributed across eastern and central North America.
Blera humeralis
Yellow-legged Wood Fly
Blera humeralis, commonly known as the yellow-legged wood fly, is a Nearctic species of hoverfly (Syrphidae) described by Samuel Wendell Williston in 1882. Adults are flower visitors that feed on nectar and pollen. The species is notable for its distinctive yellow and black coloration and rat-tailed larvae that develop in tree rot holes and sap flows. It is considered uncommon and has a restricted coastal distribution in western North America.
Blera nigra
Golden-haired Wood Fly
Blera nigra, commonly known as the golden-haired wood fly, is a Nearctic syrphid fly species first described by Williston in 1887. Adults are flower-visiting hoverflies that feed on nectar and pollen. The species exhibits distinct sexual dimorphism in facial coloration and antennal structure. Larvae are of the rat-tailed type, developing in tree rot holes or exuding sap.
Blera pictipes
Painted Wood Fly
Blera pictipes is a rare syrphid fly (family Syrphidae) distributed across the eastern and central United States. Adults are medium-sized hoverflies with distinctive yellow and black abdominal markings and yellow-banded legs. The species exhibits rat-tailed larval morphology typical of related genera, with larvae developing in rot holes and on exuding sap of trees. First described by Bigot in 1884, it remains infrequently encountered despite its relatively broad geographic range.
Blera robusta
Greenish Wood Fly
A rare Nearctic syrphid fly first described by Curran in 1922. Adults are known as flower flies, feeding on nectar and pollen. Larvae are rat-tailed type, developing in exuding sap or rot holes of trees. The species is considered uncommon throughout its range.
Blera scitula
Western Wood Fly
Blera scitula, commonly known as the western wood fly, is a syrphid hoverfly species first described by Williston in 1882. It is an uncommon Nearctic species found along the western coastal area of North America. Adults are flower visitors that obtain nectar and pollen, while larvae are of the rat-tailed type, developing in tree rot holes or feeding on exuding sap.
Blerina
Blerina is a subtribe of hoverflies (family Syrphidae) established by Mutin in 1999. It comprises six genera: Blera, Caliprobola, Cynorhinella, Lejota, Philippimyia, and Somula. These hoverflies belong to the diverse family of flower flies, many of which are important pollinators. The subtribe represents a distinct lineage within the Syrphidae, though detailed biological and ecological information remains limited in the available literature.
Brachyopa flavescens
Yellow Sapeater
Brachyopa flavescens, commonly known as the Yellow Sapeater, is a species of syrphid fly (hoverfly) described by Shannon in 1915. The species is fairly common in northeastern North America. Adults are associated with flowers, from which they obtain nectar and pollen. Larvae of the genus Brachyopa are of the rat-tailed type, though larvae of B. flavescens specifically have not been described.
Brachyopa notata
Black-banded Sapeater
Brachyopa notata is a rare species of syrphid fly (hoverfly) found in northeastern North America. Adults are flower-visiting insects that obtain nectar and pollen from flowers. The species is poorly documented, with only 25 observations recorded on iNaturalist. Larval development remains undescribed for this species, though related members of the genus Brachyopa possess rat-tailed larvae adapted to aquatic or semi-aquatic environments.
Brachypalpus
Brachypalpus is a genus of hoverflies (Syrphidae) in the subfamily Eristalinae. The genus contains multiple species, including at least one undescribed species awaiting formal taxonomic description. Species in this genus are typically associated with decaying wood and forest habitats. The undescribed status indicates ongoing taxonomic research is needed to fully characterize and name this particular lineage.
Brachypalpus
Catkin Flies
Brachypalpus is a genus of hoverflies (Syrphidae) commonly known as catkin flies. Adults are distinguished by their triangular head that projects forward and downward, and males possess a spur on the hind trochanter. The genus comprises approximately 15 described species distributed primarily across the Holarctic region. Larvae develop in decaying wood and sap flows under tree bark.
Brachypalpus cyanogaster
Bluebottle Catkin Fly, Bluebottle Catkin
Brachypalpus cyanogaster is a rare syrphid fly described by Loew in 1872. Adults are commonly found on flowers where they feed on nectar and pollen. The larvae are of the rat-tailed type and feed on decaying sap under tree bark. The species occurs in Canada and the United States.
Brachypalpus oarus
eastern catkin
Brachypalpus oarus, commonly known as the eastern catkin, is a Nearctic hoverfly (Syrphidae) described by Walker in 1849. Adults frequent flowers for nectar and pollen, while larvae possess the rat-tailed morphology characteristic of saprophagous syrphids, feeding beneath tree bark.
Brachypalpus undescribed-b
Brachypalpus undescribed-b is an undescribed species within the hoverfly genus Brachypalpus (family Syrphidae). The genus Brachypalpus comprises medium-sized, often hairy hoverflies with larvae that develop in decaying wood and sap flows. This particular taxon is recognized from specimens that have been collected but not yet formally described in the scientific literature, indicating it represents a distinct morphological entity awaiting taxonomic treatment. As with other members of the genus, it is presumed to be associated with woodland habitats and saproxylic (dead wood-dependent) ecological systems.
Ceriana
Ceriana is a genus of hoverflies (family Syrphidae) in the subfamily Eristalinae. All species are wasp mimics, exhibiting coloration and body form that resembles yellowjackets and paper wasps. Members of this genus are pollinators that visit flowers and are characterized by their hovering flight behavior. The genus was established by Rafinesque in 1815.
Ceriana abbreviata
Northern Wasp Fly
Ceriana abbreviata, known as the Northern Wasp Fly, is a rare syrphid fly species first described by Loew in 1864. The species exhibits Batesian mimicry, resembling wasps in coloration and body form to avoid predation. Adults are pollinators that visit flowers for nectar and pollen, while larvae develop in tree wounds where they feed on sap. The species has been documented across North America including the United States and Canada.
Chalcosyrphus
Leafwalkers
Chalcosyrphus is a genus of hoverflies (family Syrphidae) in the subfamily Eristalinae, commonly known as leafwalkers. Species are notable for mimicking sawflies and other hymenopterans, often displaying bright or metallic coloration. Adults are structurally and behaviorally similar to the related genus Xylota but differ in larval morphology. The genus occurs across Europe, Asia, and North America, with larvae being saproxylic feeders in rotten wood.
Chalcosyrphus curvarius
Chalcosyrphus curvarius is a species of hoverfly in the family Syrphidae, tribe Xylotini. Members of this genus are typically associated with decaying wood habitats. The larvae develop in rotting wood and fermenting sap, functioning as saprophages rather than predators. Adults are characterized by their wasp-mimicking appearance and modified hind legs, though specific details for C. curvarius remain limited in available sources.
Chalcosyrphus nemorum
Dusky-banded Leafwalker
Chalcosyrphus nemorum is a common species of syrphid fly with a Palearctic and Nearctic distribution. Adults are medium-sized hoverflies with distinctive enlarged, swollen hind femora bearing ventral spines and curved hind tibiae—adaptations associated with their association with dead wood. The species exhibits sexual dimorphism, with males having holoptic (contiguous) eyes. Larvae develop under the bark of conifers (Larix, Pinus) and various hardwoods, where they function as saprophages in decaying wood. Adults are flower visitors, obtaining nectar and pollen from diverse plant species including white umbellifers, Caltha, Anemone nemorosa, and Ranunculus.
Chalcosyrphus piger
Short-haired Leafwalker
Chalcosyrphus piger is a species of hoverfly (family Syrphidae) found across North America and Europe. Adults are commonly known as flower flies and are frequently observed around flowers where they obtain nectar and pollen. The species is considered uncommon and is distinguished from congeners by its characteristic red abdominal markings. Larvae develop in decaying wood, specifically in sappy hollows of Larix and Pinus trees.
Chalcosyrphus satanicus
Chalcosyrphus satanicus is a hoverfly species in the family Syrphidae, first described by Bigot in 1884. Like other members of the genus Chalcosyrphus, this species exhibits morphological adaptations associated with dead wood habitats. The specific epithet "satanicus" places it among a small group of insects with devil-themed scientific names. The species occurs in North America, with records from Canada and the United States.
Cheilosia albitarsis
Cheilosia albitarsis is a large, abundant European hoverfly with a flight period from April to June, extending into July at higher elevations. Adults are strongly associated with buttercup flowers (Ranunculus), which also serve as the larval host plant. The species occupies diverse habitats including woodland clearings, agricultural land, and montane pastures. It is widely distributed throughout the Palearctic region.
Cheilosia grossa
Large Bulb Fly, Foxy Bulb Fly
A large, robust hoverfly species in the family Syrphidae, widespread across Europe. Adults are active in early spring, visiting willow catkins and other early-flowering plants. The species is notable for its phytophagous larvae that tunnel within thistle stems and roots, causing characteristic plant damage. Males exhibit distinctive hovering behavior at head height, occasionally forming loose swarms.
Cheilosiina
Cheilosiina is a subtribe of hoverflies within the family Syrphidae. Members are small to medium-sized flies with distinctive facial and thoracic morphology. The group is taxonomically defined by specific cranial and mouthpart structures rather than conspicuous external features. Many species are associated with decaying organic matter and fungal habitats.
Chrysogaster antitheus
Short-haired Wrinkle Fly, Short-haired Wrinklehead
Chrysogaster antitheus is a small syrphid fly (7–8 mm) found in North America, commonly known as the Short-haired Wrinkle Fly. Adults are flower visitors that feed on nectar and pollen. The larvae are aquatic "rat-tailed" maggots with a short respiratory siphon, inhabiting pond edges and emergent vegetation.
Chrysosyrphus frontosus
Chrysosyrphus frontosus is a species of hoverfly in the family Syrphidae, subfamily Eristalinae, and tribe Brachyopini. The species was described by Bigot in 1884. It belongs to a genus of small to medium-sized syrphid flies. Published information on its biology and ecology remains limited.
Chrysosyrphus versipellis
Chrysosyrphus versipellis is a species of hoverfly (family Syrphidae) in the tribe Callicerini. Members of this genus are known for their metallic coloration and distinctive facial ornamentation. The species is associated with forested habitats and has been recorded in the Palearctic region.
Chrysotoxum chinook
Chinook Meadow Fly
Chrysotoxum chinook is a species of hoverfly (family Syrphidae) described by Shannon in 1926. The common name "Chinook Meadow Fly" suggests a potential association with meadow habitats. As a member of the genus Chrysotoxum, it belongs to a group of syrphid flies often characterized by distinctive yellow and black coloration. Beyond taxonomic classification and nomenclature, specific biological details about this species remain poorly documented in available sources.
Chrysotoxum derivatum
Narrow-banded Meadow Fly
Chrysotoxum derivatum is a North American hoverfly (family Syrphidae) first described by Francis Walker in 1849. The species is commonly known as the Narrow-banded Meadow Fly. It is a relatively large hoverfly, measuring 8.9–16.2 mm in length. The species occurs across a broad geographic range from southern Alaska through Canada and the United States to Mexico.
Copestylum
Bromeliad Flies
Copestylum is one of the largest genera of hoverflies (Syrphidae) in the Americas, comprising more than 300 species. The genus is neotropical in origin, with only four species recorded outside the Americas, likely introduced through cactus trade. Larvae are saprophagous and develop in decaying tissues of columnar cacti and other succulent plants, playing important roles in nutrient recycling in xeric environments. Adults are commonly known as bromeliad flies.
Copestylum apiciferum
Copestylum apiciferum is a species of syrphid fly in the hoverfly family Syrphidae. It belongs to a diverse genus of neotropical and nearctic flower-visiting flies commonly known as bromeliad flies. The species has been documented in 541 observations on iNaturalist, indicating it is relatively well-observed among syrphid enthusiasts. As with other members of its genus, adults likely visit flowers for nectar and pollen.
Copestylum caudatum
hairy-horned bromeliad fly
Copestylum caudatum is a syrphid fly endemic to central western North America. The common name "hairy-horned bromeliad fly" suggests an association with bromeliad plants, a trait shared with other members of the genus Copestylum. As a hoverfly, it likely contributes to pollination services in its native range. The species was described by Charles Howard Curran in 1927.
Copestylum comstocki
Comstock's Bromeliad Fly
Copestylum comstocki, commonly known as Comstock's bromeliad fly, is a species of hoverfly in the family Syrphidae. The species is native to south-central North America. As a member of the genus Copestylum, it is associated with bromeliad plants, which serve as breeding sites. The larvae develop in the water-holding leaf axils of bromeliads, a habitat specialization characteristic of this genus. Adult flies are likely flower visitors like other syrphid species, though specific floral associations remain poorly documented.
Copestylum fraudulentum
Copestylum fraudulentum is a species of hoverfly in the family Syrphidae. It belongs to a genus of bromeliad-associated flies primarily found in the Americas. The species was described by Samuel Wendell Williston in 1891. Like other members of Copestylum, adults are likely associated with flowers and may exhibit mimicry of bees or wasps, a common trait in the Syrphidae family. The larvae of related species are known to develop in bromeliad phytotelmata, though specific larval biology for C. fraudulentum has not been documented.
Copestylum haagii
Haag's bromeliad fly
Copestylum haagii, commonly known as Haag's bromeliad fly, is a species of hoverfly in the family Syrphidae. It is found in western North America. The species is associated with bromeliad plants, as indicated by its common name. Adults are flower visitors.
Copestylum macrocephalum
Copestylum macrocephalum is a species of syrphid fly in the family Syrphidae. It has been documented from the southwestern United States and northwestern Mexico, specifically from California, Arizona, and Baja California. As a member of the hoverfly family, it likely participates in pollination services, though specific ecological details remain poorly documented.
Copestylum marginatum
Syrphid fly
Copestylum marginatum is a species of syrphid fly (hoverfly) in the family Syrphidae. It has been documented in Southwestern North America, with over 3,500 observations recorded on iNaturalist. As a member of the diverse syrphid family, it likely participates in pollination services, though specific ecological details remain poorly documented in the available literature.
Copestylum opalescens
Opalescent Bromeliad Fly
Copestylum opalescens is a syrphid fly species in the tribe Volucellini, commonly known as the Opalescent Bromeliad Fly. It is one of approximately 50 species in the genus Copestylum, a group of New World flower flies predominantly associated with bromeliad microhabitats. The species was originally described by Townsend in 1901 under the genus Volucella. Like other Copestylum species, adults are likely flower visitors, though specific ecological details remain poorly documented.
Copestylum opinator
Copestylum opinator is a species of hoverfly (family Syrphidae) described by Williston in 1891. The species belongs to a genus whose members are commonly known as bromeliad flies, with some species exhibiting specialized associations with bromeliad plants. As with many Copestylum species, adults likely visit flowers for nectar and pollen. The species has been documented through limited observations, with 25 records on iNaturalist as of the knowledge cutoff.
Copestylum posticum
Copestylum posticum is a syrphid fly (family Syrphidae) described by Thomas Say in 1829. The species is documented from 39 observations on iNaturalist, indicating it is recognized in field records though detailed biological information appears limited in publicly available sources. As a member of the genus Copestylum, it belongs to a group of hoverflies commonly known as bromeliad flies, with many species in this genus exhibiting associations with bromeliad plants. The specific epithet 'posticum' (Latin for 'posterior' or 'behind') may refer to a morphological feature, though this is not confirmed in available sources.
Copestylum satur
spotted-wing bromeliad fly
Copestylum satur is a species of syrphid fly commonly known as the spotted-wing bromeliad fly. It belongs to the family Syrphidae, a group known as hoverflies or flower flies that are important pollinators. The species name references its association with bromeliad plants.
Copestylum sexmaculatum
Six-spotted Bromeliad Fly
Copestylum sexmaculatum, commonly known as the six-spotted bromeliad fly, is a species of hoverfly in the family Syrphidae. The common name references its association with bromeliad plants, which serve as hosts for its larval development. As a member of the genus Copestylum, it belongs to a group of syrphid flies whose larvae are typically found in phytotelmata—water-holding structures of plants such as bromeliads. Adults are flower visitors and contribute to pollination. The species has been documented across a broad geographic range with numerous observations recorded.
Copestylum tamaulipanum
Woolly Bromeliad Fly
Copestylum tamaulipanum is a species of syrphid hoverfly known from Mexico and the Mexico–United States border region. Larvae develop in decaying platyclades of Opuntia cacti, exhibiting saprophytic feeding behavior. Adults are flower visitors. The species has been introduced to Hawaii.
Copestylum tricinctum
Copestylum tricinctum is a species of hoverfly in the family Syrphidae, tribe Copestylini. The genus Copestylum contains approximately 60 species distributed primarily in the New World, with many species associated with flowers and rotting organic matter. The specific epithet 'tricinctum' refers to three bands or rings, likely describing abdominal patterning. This species is poorly documented in the literature, with limited published information on its biology and ecology.
Copestylum vesicularium
Iridescent Bromeliad Fly
Copestylum vesicularium, commonly known as the iridescent bromeliad fly, is a species of hoverfly in the family Syrphidae. This species is widely distributed across the eastern half of North America. The common name reflects its association with bromeliad plants, which serve as larval hosts. Like other members of the genus Copestylum, adults are likely flower visitors, though specific floral associations require further documentation.
Copestylum victoria
Victoria's bromeliad fly
Copestylum victoria is a species of syrphid fly (family Syrphidae) commonly known as Victoria's bromeliad fly. The species is named in association with bromeliads, suggesting a specialized ecological relationship with these plants. As a member of the hoverfly family, it likely participates in pollination and shares the characteristic hovering flight behavior typical of the group.
Copestylum violaceum
purple bromeliad fly
Copestylum violaceum, commonly known as the purple bromeliad fly, is a species of syrphid fly in the family Syrphidae. The species is associated with bromeliad plants, as indicated by its common name. It belongs to a diverse genus of hoverflies found primarily in the Americas. The species was first described by Thomas Say in 1829.
Criorhina
Bumble Flies
Criorhina is a genus of medium to large hoverflies (Syrphidae) that exhibit Batesian mimicry of bumblebees. The genus is characterized by a flattened, broad head and distinctive antennal placement on a prominent conical frontal process. Larvae develop in rot holes and decaying hardwoods. Several species show pronounced geographical variation in abdominal colour patterns, with morphological differences correlated with the distribution of their hymenopteran models.
Criorhina aurea
Criorhina aurea is a species of hoverfly (family Syrphidae) described by Lovett in 1919. It belongs to the tribe Milesiini within the subfamily Eristalinae. The species is known from North America, with records from Canada and the United States. As with other members of the genus Criorhina, it likely exhibits bumblebee mimicry, a common trait among hoverflies in this group.
Criorhina caudata
Red-tailed Bumblefly
Criorhina caudata is a hoverfly species in the family Syrphidae, described by Curran in 1925. It is commonly known as the Red-tailed Bumblefly. The species is found in North America, with records from Canada and the United States. Like other members of the genus Criorhina, it exhibits bumblebee mimicry as a defensive adaptation.
Criorhina coquilletti
Coquillett's Bumble Fly
Criorhina coquilletti is a species of hoverfly (family Syrphidae) known as Coquillett's Bumble Fly. The genus Criorhina belongs to the tribe Milesiini within the subfamily Eristalinae. Hoverflies in this genus are recognized for their bumble bee mimicry, a form of Batesian mimicry that provides protection from predators. The species was described by Samuel Wendell Williston in 1892.
Criorhina fusca
Dusky Yellowjacket Fly
Criorhina fusca is a hoverfly species in the family Syrphidae, described by Weisman in 1964. It is known from the United States. The species belongs to a genus whose members are notable for their mimicry of yellowjacket wasps (Vespula spp.), a form of Batesian mimicry that provides protection from predators. As with other Criorhina species, adults are likely pollinators that visit flowers for nectar and pollen.
Criorhina kincaidi
Kincaid's Bumble Fly
Criorhina kincaidi is a species of hoverfly in the family Syrphidae, commonly known as Kincaid's Bumble Fly. The species was described by Coquillett in 1901. It belongs to the tribe Milesiini within the subfamily Eristalinae. Very few observations of this species have been recorded.
Criorhina nasica
Black-backed Yellowjacket Fly
Criorhina nasica is a hoverfly species in the family Syrphidae, first described from North America in 1908. The species is known from limited observations and appears to be uncommon or underreported. It belongs to a genus characterized by bumble bee-mimicry, though specific morphological details for this species remain poorly documented in accessible literature.
Criorhina nigriventris
bare-cheeked bumble fly
Criorhina nigriventris is an uncommon species of syrphid fly known as the bare-cheeked bumble fly. Adults are flower visitors that feed on nectar and pollen. The species exhibits bumble bee mimicry, a common defensive adaptation in the genus Criorhina. Larval development occurs in decaying wood. The species has been documented across northern North America with scattered records in the Appalachian region.
Criorhina occidentalis
Western Yellowjacket Fly
Criorhina occidentalis is a species of hoverfly in the family Syrphidae, commonly known as the Western Yellowjacket Fly. It belongs to a genus of hoverflies that exhibit mimicry of stinging insects such as wasps and hornets. The species is found in North America, with records from Canada and the United States. As a member of the Syrphidae family, adults likely visit flowers for nectar and pollen, though specific biological details remain poorly documented.
Criorhina tricolor
Tricoloured Bumblefly
Criorhina tricolor is a species of hoverfly in the family Syrphidae, commonly known as the Tricoloured Bumblefly. It is a bumble bee mimic, resembling species in the genus Bombus. The species was described by Coquillett in 1900 and is found in North America.
Criorhina verbosa
Hairy-cheeked Bumble Fly
Criorhina verbosa is a species of hoverfly (family Syrphidae) commonly known as the Hairy-cheeked Bumble Fly. It belongs to the tribe Milesiini and is part of a genus whose members are notable bumblebee mimics. The species was first described by Francis Walker in 1849 under the basionym Milesia verbosa.
Criorhina villosa
Winter Bumblefly
Criorhina villosa, commonly known as the winter bumblefly, is a species of hoverfly in the family Syrphidae. It was formerly placed in its own genus, Merapioidus, before being reclassified into Criorhina. The species name has been subject to taxonomic confusion with a related Mexican species originally described as Romaleosyrphus villosus in 1882; as both species now share the genus Criorhina, the older name from 1879 takes precedence.
Criorhinina
Criorhinina is a subtribe of hoverflies (family Syrphidae) within the tribe Milesiini and subfamily Eristalinae. Members are characterized by their association with decaying wood and sap flows, where larvae develop. The subtribe includes genera such as *Criorhina* and *Sphecomyia*, which are often large-bodied and mimic bumble bees or wasps. Adults are primarily found in forested habitats.
Dasysyrphus
Dasysyrphus is a genus of hoverflies (Syrphidae) comprising approximately 50 described species distributed worldwide. The genus is relatively straightforward to identify, though species-level differentiation requires careful examination and should not rely solely on images. Adults are medium-sized with distinctive morphological features including hairy eyes and microtrichose wings. Larvae are primarily arboreal, feeding nocturnally on aphids and other small Hemiptera.
Dasysyrphus creper
Arched Brusheye
Dasysyrphus creper is a species of hoverfly in the family Syrphidae, first described by Snow in 1895. It belongs to the genus Dasysyrphus, a group of small to medium-sized syrphid flies commonly known as brusheye hoverflies. The common name "Arched Brusheye" refers to distinctive eye markings characteristic of this species. Like other members of its genus, it is likely associated with woodland habitats and aphid prey, though specific ecological details remain poorly documented.
Dasysyrphus laticaudus
Boreal Brusheye, boreal conifer fly
Dasysyrphus laticaudus is a small syrphid fly (5–8.2 mm) commonly found in Eastern and Northern North America. Adults are flower visitors that feed on nectar and pollen. The species exhibits sexual dimorphism in frons pattern, eye contact, and abdominal maculae shape. Larvae of the genus Dasysyrphus are aphid predators, though specific larval ecology for this species is not documented.
Dasysyrphus limatus
Narrow-banded Brusheye
Dasysyrphus limatus is a species of hoverfly (family Syrphidae) described by Hine in 1922. It belongs to a genus characterized by banded abdomens and is known by the common name Narrow-banded Brusheye. The species is poorly documented in scientific literature, with minimal observational records available.
Dasysyrphus occidualis
Western Brusheye
Dasysyrphus occidualis is a hoverfly species described in 2013, distinguished as a western North American representative of the Dasysyrphus genus. The common name "Western Brusheye" references its geographic position relative to other members of this group. As with other Dasysyrphus species, it belongs to a genus characterized by distinctive eye and facial setation patterns. The species remains poorly known due to its recent description and limited observational records.
Dasysyrphus pacificus
Dasysyrphus pacificus is a species of hoverfly (family Syrphidae) originally described from the Pacific Northwest region of North America. The species is currently recognized as a synonym of Dasysyrphus pauxillus. Hoverflies in this genus are commonly known as 'flower flies' due to their frequent presence at flowers, where adults feed on nectar and pollen. The larvae of Dasysyrphus species are predatory, typically feeding on aphids and other small soft-bodied insects.
Dasysyrphus pauxillus
Lesser Brusheye
Dasysyrphus pauxillus is a small hoverfly species found in both North America and Europe. It belongs to the genus Dasysyrphus, a group characterized by their distinctive thoracic pile patterns. The species was first described by Williston in 1887. It is known by the common name Lesser Brusheye.
Dasysyrphus venustus
Dasysyrphus venustus is a Holarctic hoverfly (Diptera: Syrphidae) distributed across the Palaearctic region from Fennoscandia to the Pacific coast. It is the most frequent and widely distributed species in its genus, though studies indicate it may represent a complex of cryptic species due to high morphological and genetic variability. Adults are active primarily in spring, with a flight period from April to June.
Didea
lucent flies
Didea is a Holarctic genus of hoverflies (Syrphidae) commonly known as lucent flies. Adults are large-bodied, measuring 10–15 mm, with distinctive black and yellow coloration. The genus is notable for its late-season flight activity and predatory larvae that feed on arboreal aphids.
Didea alneti
Didea alneti is a Holarctic hoverfly species with a wide distribution spanning Europe, Asia, and North America. Adults are arboreal, descending to visit flowers of various herbaceous plants and shrubs. The larvae are arboreal predators that feed on aphids associated with trees including Larix, Prunus, Salix, and Quercus.
Didea fuscipes
Undivided Lucent
Didea fuscipes is a species of hoverfly (Syrphidae) in the tribe Syrphini. It is commonly known as the Undivided Lucent. As a member of the genus Didea, it shares the characteristic broad, somewhat flattened abdomen typical of this group. The species was described by Loew in 1863. Observations of this species are documented in North America, including Vermont in the United States.
Dioprosopa
drone flies
Dioprosopa is a genus of hoverflies (family Syrphidae) in the tribe Syrphini, containing two described species found in the New World. The genus was elevated from subgenus rank in 2018 based on phylogenetic studies. Both species occur in tropical and subtropical regions of the Americas, where they contribute to ecosystem services through adult pollination and larval predation on agricultural pests.
Dioprosopa clavata
Four-speckled Hover Fly
Dioprosopa clavata is a Neotropical hoverfly (Diptera: Syrphidae) and the type species of genus Dioprosopa. Adults feed on nectar and pollen, while larvae are aphidophagous predators that also attack spittlebugs and other hemipteran pests. The species provides dual ecosystem services as both a pollinator and biological control agent in natural habitats and agroecosystems, including citrus orchards. Climate change projections indicate substantial habitat loss by 2100, with range contractions in tropical lowlands and modest shifts toward cooler, higher-elevation refugia.
Doros aequalis
Canadian Potter Fly
Doros aequalis is a species of syrphid fly commonly known as the Canadian Potter Fly. It belongs to the family Syrphidae, a diverse group of true flies often recognized for their bee- or wasp-like appearance. The species was first described by Loew in 1863. Records indicate it occurs in parts of North America, including Vermont and other areas in the United States.
Eosalpingogaster nepenthe
Eosalpingogaster nepenthe is a species of hoverfly (family Syrphidae) described by Hull in 1943. It belongs to the tribe Syrphini within the subfamily Syrphinae. The specific epithet 'nepenthe' references the mythical drug of forgetfulness from Greek literature, a naming convention shared with the pitcher plant genus Nepenthes. As a member of the hoverfly family, it likely participates in pollination services, though specific biological details remain poorly documented.
Epistrophe grossulariae
Black-horned Smoothtail
Epistrophe grossulariae is a Holarctic hoverfly species in the family Syrphidae, commonly known as the Black-horned Smoothtail. It is a medium-sized syrphid fly with distinctive morphological features that distinguish it from congeners. The species has been well-documented across Europe with substantial observational records.
Epistrophe nitidicollis
Straight-banded Smoothtail
Epistrophe nitidicollis is a hoverfly species with a broad Holarctic distribution spanning Europe, North America, and northern Asia. Adults are medium-sized with distinctive yellow facial markings and a black-and-yellow banded abdomen. The species is strongly associated with deciduous woodland habitats where larvae prey on aphids. Adults visit diverse flowering plants including umbellifers and early spring bloomers.
Epistrophella emarginata
Slender Smoothtail
Epistrophella emarginata is a common North American hoverfly (family Syrphidae) with larvae that are specialized aphid predators. The species is notable for its distinctive egg-laying behavior: females oviposit specifically on leaf petioles rather than on aphid-infested foliage or other substrates. This species is widely distributed across the United States, Canada, and extends into Mexico and Central America.
Episyrphus balteatus
marmalade hoverfly, marmalade hover fly
Episyrphus balteatus, commonly known as the marmalade hoverfly, is a small (9–12 mm) syrphid fly native to the Palaearctic region. It is considered the most abundant native hoverfly in Central Europe. Adults are significant pollinators of flowering plants, while larvae are voracious predators of aphids, consuming up to approximately 400 aphids before pupation. The species exhibits partial migratory behavior, with some individuals moving southward in autumn while others overwinter locally.
Eristalinae
Drone Flies and Allies
Eristalinae is a subfamily of hoverflies (Syrphidae) comprising approximately nine tribes and notable for exceptional Batesian mimicry of bees and wasps. Adults are important pollinators, while larvae exhibit the greatest habitat diversity among hoverflies, occupying aquatic environments, decaying organic matter, sap runs, and even wasp nests. The subfamily includes the well-known drone fly (Eristalis tenax), whose larvae—called rat-tailed maggots—possess an extendable posterior breathing siphon.
Eristalini
Rat-tail Maggot Flies
Eristalini is a tribe of hoverflies (Syrphidae) characterized by larvae known as "rat-tailed maggots," which possess a posterior telescopic breathing siphon. Several species are notable hymenopteran mimics: Eristalis species resemble honeybees, while Helophilus and Parhelophilus display wasp-like yellow and black striping. Adults function as pollinators, while larvae inhabit aquatic or semi-aquatic environments rich in decaying organic matter.
Eristalinus
Lagoon Flies
Eristalinus is a genus of hoverflies (family Syrphidae) characterized by distinctive spotted or banded eye patterns in most species. These stout, nimble fliers are distributed across Europe, Africa, Asia, and the Americas, with several species becoming widespread invasives outside their native ranges. The genus has undergone taxonomic revision, with molecular and morphological studies reorganizing former subgenera Eristalodes and Lathyrophthalmus into two primary clades. Species such as E. taeniops and E. aeneus are notable for their rapid global spread and potential as managed pollinators in agricultural systems.
Eristalinus aeneus
Common Lagoon Fly
Eristalinus aeneus is a hoverfly (Syrphidae) with subcosmopolitan distribution, commonly found in freshwater habitats including coastal lagoons, ponds, and slow-moving rivers. Adults are effective pollinators of crops including watermelon and mango, and have been evaluated as managed pollinators in protected agriculture. The species exhibits distinctive patterned eyes with black spots, metallic coloration, and rapid hovering flight. Larvae develop in aquatic or semi-aquatic environments with decaying organic matter, possessing a characteristic extensible breathing siphon.
Eristalis
Drone Flies, Droneflies
Eristalis is a large genus of hoverflies (family Syrphidae) comprising approximately 99 species. Adults are commonly called drone flies due to their resemblance to honeybee drones, a form of Batesian mimicry that provides protection from predators. The larvae, known as rat-tailed maggots, are aquatic and possess an extendable breathing siphon that allows them to inhabit oxygen-depleted environments such as stagnant water, sewage, and decomposing organic matter. Adults are important generalist pollinators, with some species proposed as managed alternatives to honey bees for agricultural pollination.
Eristalis anthophorina
orange-spotted drone fly
Eristalis anthophorina, the orange-spotted drone fly, is a syrphid fly with Holarctic distribution. Adults reach approximately 15 mm in length and are notable mimics of bumblebees. The species is strongly associated with wetland habitats including bogs, fens, and woodland pools. It has been observed visiting flowers of Verbena hastata, Salix myricoides, and Hesperis matronalis.
Eristalis arbustorum
Eurasian Drone Fly, European Drone Fly
Eristalis arbustorum is a sexually dimorphic hoverfly species in the family Syrphidae. Females closely mimic small, dark mining bees (Andrenidae), while males exhibit less specific mimicry of wasps and other yellow-black Hymenoptera. The species is abundant across the Northern Hemisphere and has been introduced to North America. Adults are important pollinators that visit diverse flowering plants, while larvae are aquatic filter-feeders known as 'rat-tailed maggots' due to their elongated posterior breathing siphon. The species is known to be migratory in Europe, with populations overwintering in sheltered locations such as cave entrances.
Eristalis bellardii
Mexican mountain drone fly
Eristalis bellardii is an uncommon syrphid fly species first described in 1867. It is found in the Southwestern United States, Mexico, and Central America. The species exhibits Batesian mimicry of honeybees, with adults visiting flowers for nectar and pollen. Larval biology remains unknown.
Eristalis brousii
Hourglass Drone Fly
Eristalis brousii, commonly known as the hourglass drone fly, is a hoverfly species first described by Samuel Wendell Williston in 1882. The species has experienced severe population decline across North America following the introduction of the European congener Eristalis arbustorum near Toronto around 1885. As of 2019, it persists only along the lake margin of Hudson Bay in Northern Canada, making it one of the most geographically restricted hoverflies on the continent. Like other Eristalis species, adults are pollinators while larvae develop as aquatic filter-feeders.
Eristalis cryptarum
Bog-dwelling Drone Fly, Bog Hoverfly
Eristalis cryptarum is a Holarctic hoverfly species specializing in bog and wetland habitats. It is notable for its restricted distribution and significant population declines across Europe, with extirpation from much of its former English range and critical endangerment in Denmark. The species exhibits classic Eristalis morphology with distinctive coloration and is a member of the drone fly group, though it is not a bee mimic to the same degree as some congeners. Its larvae are assumed to be aquatic filter-feeders in saturated peat, though they remain undescribed.
Eristalis flavipes
orange-legged drone fly
Eristalis flavipes, commonly known as the orange-legged drone fly, is a North American hoverfly in the family Syrphidae. Adults are striking mimics of bumblebees, measuring 13–17 mm in length, with abundant bright yellow pile on a black body and distinctive orange-red legs. The species is active from early April through mid-October, occurring across diverse habitats with particular affinity for wetlands. Adults visit flowers for nectar and pollen, while larvae are aquatic rat-tailed maggots that filter-feed in standing water.
Eristalis fratercula
Eristalis fratercula is a species of drone fly in the family Syrphidae, described by McNeill. It belongs to a genus of hoverflies known for Batesian mimicry of bees and wasps. The species is listed in grasshopper survey records from Colorado and Wyoming, suggesting it occurs in western North American grasslands. Like other Eristalis species, adults are likely pollinators and larvae develop in aquatic or semi-aquatic organic-rich habitats.
Eristalis gomojunovae
Arctic Drone Fly
A species of hoverfly in the genus Eristalis, commonly known as the Arctic Drone Fly. Described by Violovich in 1977, this species belongs to the drone fly group within the family Syrphidae. Like other Eristalis species, it is presumed to exhibit Batesian mimicry of bees or wasps. The specific epithet honors an individual, following the naming convention for this species. Very limited information exists on its biology and ecology compared to better-studied congeners such as Eristalis tenax.
Eristalis hirta
Black-footed Drone Fly
Eristalis hirta, commonly known as the black-footed drone fly, is a syrphid fly species first described by Loew in 1866. It is a common species in Western North America and also occurs in Northern Europe. Like other Eristalis species, it exhibits Batesian mimicry of honey bees, providing protection from predators. The larvae are aquatic filter-feeders with the characteristic rat-tailed morphology, developing in standing water habitats.
Eristalis interrupta
Eristalis interrupta is a species of hoverfly (family Syrphidae) in the genus Eristalis. Like other members of this genus, it belongs to a group commonly known as drone flies due to their resemblance to honey bees. The genus Eristalis contains species that are important pollinators and whose larvae are aquatic decomposers found in organic-rich water. Specific details about E. interrupta are limited in the provided sources, though it shares the general characteristics of Eristalis species including Batesian mimicry of bees and wasps.
Eristalis obscura
Dusky Drone Fly
Eristalis obscura, commonly known as the dusky drone fly, is a species of syrphid fly first described by Loew in 1866. It is widespread across northern North America and extends eastward through Europe to Siberia. The species exhibits the characteristic rat-tailed maggot larval form, with aquatic larvae that function as filter-feeders. Like other members of the genus Eristalis, adults are likely bee mimics, though specific documentation of this behavior for E. obscura is limited.
Eristalis rupium
Spot-winged Drone Fly
Eristalis rupium, the spot-winged drone fly, is a European hoverfly species first described by Fabricius in 1805. It is a common species across Europe and uncommon in North America. Like other Eristalis species, it exhibits Batesian mimicry of honey bees and serves as an important pollinator. The larvae are aquatic filter-feeders of the rat-tailed type, inhabiting clear-water streams.
Eristalis saxorum
Blue-polished Drone Fly
Eristalis saxorum is an uncommon species of syrphid fly (hoverfly) native to eastern North America. Adults are flower visitors, obtaining nectar and pollen from blossoms. The species exhibits typical drone fly characteristics, including bee-mimicry and hovering flight behavior. Larvae are presumed to be of the rat-tailed type, though they have not been formally identified for this species. The species is active from mid-March through late October, with adults overwintering in sheltered locations such as cave entrances.
Eristalis tenax
Common Drone Fly, Drone Fly, Rat-tailed Maggot
Eristalis tenax is a cosmopolitan hoverfly (Syrphidae) and the most widely distributed syrphid species globally, occurring on every continent except Antarctica. Adults are striking mimics of honey bees, exhibiting Batesian mimicry that provides protection from predators. The larval stage, known as the rat-tailed maggot, is aquatic and inhabits polluted water containing organic matter, using an elongated posterior siphon for respiration. Adults are important generalist pollinators, particularly of Asteraceae flowers. The species exhibits strong territorial behavior in males and has been documented to cause rare cases of accidental myiasis in humans.
Eristalis transversa
Transverse-banded Drone Fly, Transverse Flower Fly
Eristalis transversa is a hoverfly in the family Syrphidae, first described by Wiedemann in 1830. Adults are bee mimics, displaying Batesian mimicry of stinging Hymenoptera. The species is common in eastern North America and is frequently observed visiting flowers for nectar and pollen. Like other Eristalis species, adults are important pollinators, though specific larval habitat for this species has not been documented.
Eumerus
Lesser Bulb Flies
Eumerus is a large genus of hoverflies (family Syrphidae) comprising approximately 281 species. Adults are small to medium (5–12 mm) with distinctive morphological features including a smooth cylindrical abdomen, powerful hind legs with thickened femora, and a flat hairy face. The genus is notable for containing several agricultural pests whose larvae damage bulbs and roots of ornamental and crop plants.
Eumerus funeralis
Lesser Bulb Fly
Eumerus funeralis, commonly known as the Lesser Bulb Fly, is a small hoverfly in the family Syrphidae. Originally described from the Mediterranean basin, it has become cosmopolitan in distribution, particularly widespread in the Palaearctic and Nearctic regions. The species is notable for its phytophagous larvae, which develop in damaged bulbs and are recognized as a minor pest of ornamental plants including Narcissus, Hyacinthus, and Amaryllis.
Eupeodes
Aphideaters, aphideater flies
Eupeodes is a genus of moderate-sized hoverflies in the family Syrphidae, commonly known as aphideaters. Adults are black with yellow markings and are distributed worldwide. The genus is part of the Syrphini tribe and is frequently mistaken for similar genera. Both life stages serve important ecological functions: larvae are aphid predators, while adults are pollinators.
Eupeodes americanus
American hoverfly, Long-tailed Aphideater
Eupeodes americanus, the American hoverfly, is a Nearctic aphidophagous hoverfly commercialized in Canada as a biological control agent for aphid management. Adults feed on nectar and pollen, while larvae are voracious predators of aphids, with one larva consuming approximately 2,000 aphids during development. The species is notable for its ability to remain active at low temperatures (12–18°C) where other biocontrol agents become inactive. It has been evaluated as a biocontrol agent for greenhouse and field crops including sweet pepper, cucumber, cotton, soybeans, melons, and potatoes.
Eupeodes fumipennis
Western Aphideater
Eupeodes fumipennis is a species of syrphid fly commonly known as the Western Aphideater. As a hoverfly, it is a member of the family Syrphidae, a group known for their distinctive hovering flight and frequent mimicry of bees and wasps. The species name references its smoky or darkened wing coloration. Like many Eupeodes species, it is likely predatory or parasitic in its larval stage, though specific biological details for this species are limited in the provided sources.
Eupeodes latifasciatus
Broad-banded Aphideater, meadow field syrph
Eupeodes latifasciatus is a small hoverfly with wing length 6.5–8.5 mm, distinguished by yellow markings fused into bands on abdominal segments three and four. Adults feed on nectar from diverse flowers and serve as pollinators. Larvae are aphid predators, feeding on aphids and scale insects (Hemiptera). The species has a broad distribution across the Palaearctic and Nearctic regions, with flight activity primarily from May to September.
Eupeodes perplexus
bare-winged aphideater
Eupeodes perplexus, commonly known as the bare-winged aphideater, is a hoverfly species native to North America. The species is notable for its distinctive wing venation and abdominal patterning. Adults are nectar feeders, while larvae are predatory, consuming aphids and scale insects. The species is part of the diverse syrphid fauna that contributes to both pollination and biological control in various ecosystems.
Eupeodes pomus
Short-tailed Aphideater
Eupeodes pomus, commonly known as the short-tailed aphideater, is a species of syrphid fly distributed across North America. Adults are flower-visiting insects that feed on nectar and pollen, while larvae are aphid predators. The species belongs to a family noted for wasp-mimicking appearance and hovering flight behavior.
Eurimyia
rat-tail maggot flies, swamp flies
Eurimyia is a genus of hoverflies (family Syrphidae) containing three described species. These flies are commonly known as rat-tail maggot flies due to the distinctive elongated breathing tube of their aquatic larvae. The genus was established by Bigot in 1883 and previously included species now classified under Lejops. Adults are associated with wetland habitats.
Fazia
Fazia is a genus of hoverflies (Diptera: Syrphidae) in the tribe Syrphini, established by Shannon in 1927. The genus belongs to the subfamily Syrphinae and is part of the diverse family of flower flies. Records indicate at least 2,300 observations on iNaturalist, suggesting it is a moderately documented group in nature-based citizen science. Specific species-level information remains limited in available sources.
Fazia micrura
Diamond Spottail
Fazia micrura is a species of hoverfly in the family Syrphidae, commonly known as the Diamond Spottail. First described by Osten Sacken in 1877, it belongs to the tribe Syrphini. The species has been documented through over 1,900 observations on iNaturalist, indicating it is relatively well-recorded. As a member of the hoverfly family, it is presumed to be a pollinator and may exhibit Batesian mimicry of bees or wasps.
Ferdinandea buccata
Common Copperback
Ferdinandea buccata is a species of hoverfly in the family Syrphidae, commonly known as the Common Copperback. The species was first described by Loew in 1863 under the basionym Chrysochlamys buccata. As a member of the tribe Rhingiini within the subfamily Eristalinae, it belongs to a group of syrphid flies often associated with particular larval habitat preferences. Adult hoverflies in this genus are typically found in wooded or semi-open habitats where they visit flowers for nectar and pollen.
Ferdinandea croesus
Golden Copperback
Ferdinandea croesus is a species of hoverfly (family Syrphidae) first described by Osten Sacken in 1877. It belongs to the tribe Rhingiini within the subfamily Eristalinae. The species is known by the common name Golden Copperback and has been documented in North America with observations recorded on citizen science platforms.
Hadromyia aepalius
Sterling Quicksilver
Hadromyia aepalius, known as the Sterling Quicksilver, is a rare hoverfly (family Syrphidae) found in eastern North America. The species exhibits a distinctive shining metallic bronze coloration that gives it its common name. It belongs to a genus of relatively uncommon flower-visiting flies. Observations are sparse, with only five documented records on iNaturalist.
Hadromyia crawfordi
Golden Quicksilver
Hadromyia crawfordi is a species of hoverfly (family Syrphidae) native to western North America. It is commonly known as the Golden Quicksilver. The species was originally described as Caliprobola crawfordi by Shannon in 1916 and later transferred to the genus Hadromyia. It is one of several species in the genus Hadromyia, which are characterized by their distinctive metallic coloration.
Hadromyia grandis
Bee-like Quicksilver
Hadromyia grandis is a species of hoverfly in the family Syrphidae, commonly known as the Bee-like Quicksilver. The species was described by Williston in 1882 and is currently accepted in the genus Hadromyia. It belongs to the tribe Milesiini within the subfamily Eristalinae.
Hadromyia pulchra
Yellow-shielded Quicksilver
Hadromyia pulchra is a species of hoverfly (family Syrphidae) known by the common name Yellow-shielded Quicksilver. It occurs in North America, with records from Canada and the United States. As a syrphid fly, it belongs to a group commonly recognized for their bee- or wasp-mimicking appearance and ecological roles as pollinators.
Hammerschmidtia
Hammerschmidtia is a Holarctic genus of hoverflies (Diptera: Syrphidae) in the tribe Brachyopini. Larvae develop in sap under the bark of freshly fallen trees, particularly decaying aspen (Populus tremula). The genus includes five described species, with H. ferruginea being endangered in parts of its range due to habitat loss.
Hammerschmidtia rufa
black-bristled logsitter
Hammerschmidtia rufa, known as the black-bristled logsitter, is an uncommon syrphid fly species distributed across North America. Adults are flower flies that visit flowers for nectar and pollen. The species has been found in association with deciduous trees, with larvae occurring under bark. It was originally described as Hammerschmidtia ferruginea by Curran.
Helophilus
Marsh Flies, Tiger Hoverflies
Helophilus is a genus of moderate to large hoverflies in the family Syrphidae, commonly known as marsh flies or tiger hoverflies. Adults are notable bee or wasp mimics with distinctive lengthwise yellow stripes on the thorax and transverse bands on the abdomen. Larvae are aquatic "rat-tailed maggots" that filter-feed on microorganisms in organic-rich water. The genus comprises two subgenera: Helophilus and Pilinasica (the latter containing endemic New Zealand species).
Helophilus bottnicus
Gray-banded Marsh Fly
Helophilus bottnicus is a hoverfly in the family Syrphidae, commonly known as the Gray-banded Marsh Fly. It belongs to a genus whose larvae are aquatic, developing in decaying organic matter submerged in water. Adults are sun-loving and often exhibit yellowjacket mimicry with characteristic thoracic striping. The species was described by Wahlberg in 1844 and is recorded from Norway and Sweden.
Helophilus fasciatus
Narrow-headed Marsh Fly
Helophilus fasciatus, commonly known as the narrow-headed marsh fly, is a syrphid fly species widespread across the United States and Canada. Adults are flower visitors that feed on nectar and pollen. The larvae develop in wet, decaying organic matter, particularly accumulations of decaying vegetation in ponds and mud. This species is one of the more frequently observed hoverflies in North America, with over 18,000 observations recorded on iNaturalist.
Helophilus groenlandicus
Black-margined Marsh Fly
Helophilus groenlandicus, commonly known as the Black-margined Marsh Fly, is a hoverfly in the family Syrphidae. Adults are flower visitors that obtain nectar and pollen. The species occurs across the northern Holarctic region. Larval biology is not directly documented for this species, though related Helophilus species develop in wet decaying organic material with rat-tailed maggot morphology.
Helophilus hybridus
hoverfly
Helophilus hybridus is a Palearctic hoverfly species in the family Syrphidae. Adults are medium-sized with distinctive yellow and black abdominal patterning. The species is associated with wetland habitats across northern and central Europe, extending eastward through Russia to the Pacific coast. Larvae develop in aquatic or semi-aquatic environments with organic matter.
Helophilus intentus
Yellow-legged Marsh Fly
Helophilus intentus is a species of syrphid fly (flower fly) in the family Syrphidae. It belongs to the genus Helophilus, whose members are commonly known as marsh flies due to their association with aquatic habitats. The larvae develop in decaying plant matter submerged in water. Adults are sun-loving and frequently observed visiting flowers for nectar and pollen.
Helophilus lapponicus
Yellow-margined Marsh Fly
Helophilus lapponicus is a Holarctic species of hoverfly found across northern North America, northern Europe, Greenland, and Siberia. Adults are medium-sized syrphid flies, 12.5–13.5 mm in length, commonly observed visiting flowers for nectar and pollen. The species is distinguished by yellow abdominal markings and specific wing venation. Larval biology remains undocumented, though congeneric species develop in wet decaying organic matter.
Helophilus latifrons
Broad-headed Marsh Fly
Helophilus latifrons, commonly known as the Broad-headed Marsh Fly, is a species of syrphid fly in the family Syrphidae. Adults are flower visitors that obtain nectar and pollen from blossoms. The larvae are aquatic and develop in decaying submerged vegetation, functioning as decomposers in wetland ecosystems. The species occurs across much of North America including the United States, southern Canada, and mountainous regions of Mexico.
Helophilus neoaffinis
Northwestern Marsh Fly
A syrphid fly species in the genus Helophilus, recognized by iNaturalist as the Northwestern Marsh Fly. As with other members of its genus, it likely exhibits yellowjacket mimicry with vertical yellow stripes on the thorax. The larvae develop in decaying plant matter submerged in water, characteristic of the 'rat-tailed maggot' form found in aquatic or semi-aquatic habitats.
Helophilus obscurus
obscure marsh fly
Helophilus obscurus is a syrphid fly commonly found across Canada, the northern United States, and the Rocky Mountains. Adults are flower visitors that obtain nectar and pollen. The species is part of the marsh fly genus Helophilus, though the larval biology of this specific species remains undocumented. It is one of several North American Helophilus species that exhibit yellowjacket mimicry.
Heringia
Smoothleg Flies
Heringia is a genus of small hoverflies (Syrphidae) commonly known as Smoothleg Flies. Species occur in North America and Europe. Larvae are predatory on specific aphid species, including woolly apple aphid (Eriosoma lanigerum), woolly elm aphid (Schizoneura), and aphids on poplar (Pemphigus) and fir (Dreyfusia). Adults feed on honeydew and pollen. The genus is part of the "little black fly" group, with females generally unidentifiable to species.
Heringia canadensis
Canadian smoothleg
Heringia canadensis, commonly known as the Canadian smoothleg, is a species of hoverfly (family Syrphidae) found across much of North America. Adults are frequently observed visiting flowers to feed on nectar and pollen. The species belongs to the tribe Pipizini, whose larvae are known aphid predators, though specific larval biology for this species remains incompletely documented. It is considered fairly common within its range.
Heringia salax
Eastern Smoothleg, Eastern Smoothleg Fly
Heringia salax, commonly known as the Eastern Smoothleg Fly, is a species of hoverfly in the family Syrphidae. Adults visit flowers to feed on nectar and pollen. The larvae are predatory, feeding on aphids. The species is recorded across North America.
Hiatomyia
Deltawings
Hiatomyia is a Holarctic genus of hoverflies (family Syrphidae) characterized by a distinctive plumose arista and shiny black coloration. The genus contains approximately 22 described species, with authorship dating to Shannon (1922). These flies are relatively poorly known compared to many other syrphid genera, with limited observational data available.
Hypocritanus
Hypocritanus is a genus of hoverflies (family Syrphidae) described by Miranda in 2020. The genus is found in the Neotropical region and contains at least two described species: H. fascipennis and H. lemur. As a member of the tribe Syrphini, these flies are part of a diverse group of flower-visiting insects.
Laetodon
Laetodon is a genus of hoverflies in the family Syrphidae, subfamily Microdontinae, established by Reemer in 2013. The genus belongs to the tribe Microdontini, a group of hoverflies whose larvae develop within ant nests. Laetodon represents one of several genera within this specialized myrmecophilous lineage.
Laetodon laetus
Small Metallic Ant Fly
Laetodon laetus is a small hoverfly (family Syrphidae) in the subfamily Microdontinae, commonly known as the Small Metallic Ant Fly. Members of Microdontinae are myrmecophilous, meaning they have ecological associations with ants. The species exhibits metallic coloration and has been documented in limited observations, with 41 records on iNaturalist suggesting it is infrequently encountered or underreported.
Lapposyrphus
Lapposyrphus is a genus of hoverflies (family Syrphidae) established by Dušek & Láska in 1967. The genus was historically treated as part of Eupeodes, from which it was later separated based on morphological distinctions. It contains two species: L. lapponicus and L. abberrantis. Members are found in northern and boreal regions of Europe.
Lapposyrphus aberrantis
Western Loopwing Aphideater
Lapposyrphus aberrantis is a species of hoverfly in the family Syrphidae, first described by Charles Howard Curran in 1925. It is commonly known as the Western Loopwing Aphideater. The genus Lapposyrphus comprises aphidophagous hoverflies, and this species follows the general ecological pattern of the group. Observations are relatively sparse, with 54 records on iNaturalist.
Lejota cyanea
Cobalt Trunksitter
Lejota cyanea, commonly known as the cobalt trunksitter, is an uncommon syrphid fly found in northeastern and western North America. Adults are flower-visiting hoverflies that feed on nectar and pollen. The larvae develop in decaying tree roots, a trait characteristic of the genus Lejota.
Lepidomyia micheneri
Michner's Scaleback
Lepidomyia micheneri is a species of hoverfly (family Syrphidae) described by Fluke in 1953. It belongs to the tribe Brachyopini within the subfamily Eristalinae. The species is known from very few observations, with only two records documented on iNaturalist. It is commonly referred to as "Michner's Scaleback."
Leucozona velutina
Western Hoary
Leucozona velutina is a species of hoverfly (family Syrphidae) in the order Diptera. The species was described by Williston in 1882. Like other syrphid flies, adults are likely pollinators that visit flowers for nectar and pollen. The genus Leucozona includes species that are often associated with woodland and forest edge habitats.
Lycastrirhyncha
neotropical flower flies, neotropical hoverflies
Lycastrirhyncha is a genus of neotropical hoverflies (Syrphidae) comprising five described species. The genus was established by Bigot in 1859 with L. nitens as the type species. At least one species, L. nitens, has been documented as a flower visitor in wetland habitats, where it forages on Pontederia sagittata inflorescences. Observations indicate temporal variation in foraging behavior correlated with nectar availability.
Lycastrirhyncha nitens
Lycastrirhyncha nitens is a hoverfly species (Diptera: Syrphidae) first described by Bigot in 1859. It is known from floral visitation studies on Pontederia sagittata (arrowhead water hyacinth), where it exhibits temporal variation in foraging behavior correlated with nectar availability. The species has been documented in wetland habitats across Brazil, with GBIF records indicating presence in all 26 Brazilian states and the Federal District.
Mallota
Mimic Flies
Mallota is a Holarctic genus of hoverflies (family Syrphidae) containing approximately 30 described species. Adults are well known for their robust, bee-like appearance, functioning as mimics of bumble bees (Bombus species). The genus has been documented from North America, Europe, and Asia. Larvae develop in water-filled tree holes and other decaying wood cavities.
Mallota bautias
Bare-eyed Bee-mimic Fly
Mallota bautias is a hoverfly (family Syrphidae) native to eastern North America. The species is notable for its exceptional mimicry of bumblebees (genus Bombus), particularly Bombus pennsylvanicus, serving as a classic example of Batesian mimicry in which a harmless species evolves to resemble a stinging model. Adult flies are pollinators, while larvae develop in tree holes filled with water. The species has been the subject of behavioral studies examining how avian predators respond to the mimic and its model.
Megasyrphus catalina
Yellow-legged Gossamer
Megasyrphus catalina is a species of hoverfly in the family Syrphidae, described by Curran in 1930. The species is known by the common name 'Yellow-legged Gossamer.' As a member of the subfamily Syrphinae and tribe Syrphini, it belongs to a diverse group of flies commonly known as flower flies or hoverflies, many of which are important pollinators. The specific epithet 'catalina' likely references the Santa Catalina Mountains in Arizona, suggesting a southwestern North American distribution. Very few observations of this species have been documented, with only four records in iNaturalist as of the knowledge cutoff.
Megasyrphus laxus
black-legged gossamer fly, Black-legged Gossamer
Megasyrphus laxus, the black-legged gossamer fly, is an uncommon syrphid fly species found across North America. Adults are associated with flowers, where they feed on nectar and pollen. The species is capable of hovering flight. Larval stages remain undescribed.
Melangyna
Halfbands
Melangyna is a genus of hoverflies (Syrphidae) distributed across the Holarctic region, with subgenera in the Nearctic, Palearctic, and Australasian regions. Adults are frequent flower visitors, while larvae are predatory on aphids. The genus exhibits sexual dimorphism in behavior and morphology, with males typically larger than females and showing distinct foraging and habitat exploration patterns.
Melangyna arctica
Alder Halfband
Melangyna arctica is a Holarctic hoverfly species distributed across northern Europe, Asia, and North America. The species is strongly associated with coniferous and deciduous woodlands, where adults visit flowers of trees and herbs during spring. Larvae develop as predators on aphids in arboreal habitats.
Melangyna coei
Coe's Halfband
Melangyna coei is a species of hoverfly in the family Syrphidae, described by Nielsen in 1971. The species is known from Norway and Sweden, and has been assigned the common name 'Coe's Halfband' in iNaturalist. As a member of the genus Melangyna, it belongs to a group of small to medium-sized hoverflies commonly associated with coniferous and mixed forests.
Melangyna lasiophthalma
Hairy-eyed Halfband
Melangyna lasiophthalma is a Holarctic hoverfly species with a broad distribution across northern temperate regions. Adults are active in spring, visiting diverse flowering plants in wooded and semi-open habitats. The species is associated with deciduous and coniferous forests, riparian woodlands, and anthropogenic environments including gardens and orchards.
Melangyna umbellatarum
Bare-winged Halfband
Melangyna umbellatarum is a Holarctic hoverfly species with a transcontinental distribution spanning Eurasia and North America. Adults are medium-sized with distinctive orange leg markings and pale thoracic hairs that distinguish them from similar congeners. The species is strongly associated with willow-dominated riparian habitats and has a documented flight period from May through September.
Melanostoma
Melanostoma is a large genus of hoverflies (Syrphidae) established by Schiner in 1860. Members of this genus are small, slender flies with relatively simple coloration compared to many other syrphids. Biological information remains limited; adults have been observed visiting flowers, while larvae are suspected to be general predators of small insects in leaf litter and ground-level vegetation.
Melanostoma mellinum
Variable Duskyface Fly
Melanostoma mellinum is a widespread and abundant hoverfly species native to the Palearctic region, with introduced populations in North America. It is one of the most commonly recorded syrphid flies in Britain and Europe, frequently encountered in agricultural landscapes including vineyards, grasslands, and wetlands. The species has been studied for its response to landscape structure, showing increased abundance in areas with greater proportions of seminatural habitats.
Meligramma cincta
Meligramma cincta is a European hoverfly species in the family Syrphidae. The species has a complex taxonomic history, having been placed in multiple genera including Melangyna, Meligramma (as either a separate genus or subgenus), and Fagisyrphus by different authorities. It is one of approximately 529 observation records on iNaturalist.
Meligramma guttata
Spotted Roundtail
Meligramma guttata is a Holarctic species of hoverfly in the family Syrphidae. It is commonly known as the Spotted Roundtail. The species has been recorded across parts of Europe including Belgium, Denmark, and Norway. As a member of the Syrphidae, it likely exhibits the typical hoverfly behavior of visiting flowers for nectar and pollen, though specific ecological details remain limited in available sources.
Meligramma triangulifera
Variable Roundtail
Meligramma triangulifera is a hoverfly species first described from Europe in 1843. Taxonomic revisions have synonymized several Nearctic species names (M. tenuis, M. cincta) under this species, expanding its recognized range. Identification keys exist for both adult and puparial stages. The species has been recorded across Europe and the Nearctic region.
Merodon equestris
Narcissus bulb fly, greater bulb fly, large bulb fly, large Narcissus fly
Merodon equestris is a Holarctic hoverfly (Syrphidae) and a significant horticultural pest of bulbous plants. Adults are bumblebee mimics with variable coloration controlled by multiple genetic loci, flying low in zig-zag patterns April through July. Larvae develop internally within bulbs of Amaryllidaceae and Liliaceae, particularly Narcissus, causing economic damage in cultivated settings.
Meromacrus
Elegant Flies
Meromacrus is a genus of 43 species of large, conspicuous hoverflies (Syrphidae) distributed from the southern United States through the Neotropics to northern Argentina and Chile. Adults are frequent flower visitors and pollinators. Larvae are saprophagous, developing in decaying plant matter including rot holes, decaying stems, and rotting cacti.
Milesia
Giant Flower Flies
Milesia is a genus of very large hoverflies (family Syrphidae) known for their striking resemblance to social wasps. Adults are among the largest flower flies, with body lengths reaching 18–28.5 mm. The genus is notable for Batesian mimicry of hornets and yellowjackets, including similar coloration and a loud droning buzz. At least three species occur in North America: M. virginiensis (eastern North America), M. bella (southwestern U.S.), and M. scutellata (southeastern U.S.).
Milesia scutellata
Yellow-backed Giant
Milesia scutellata is a species of hoverfly (family Syrphidae) described by Hull in 1924. It belongs to the genus Milesia, which includes several large, wasp-mimicking species found in North America. The species is known from the southeastern United States, ranging from southeast Oklahoma to North Carolina. Like other members of its genus, it likely exhibits Batesian mimicry of stinging wasps, though specific behavioral and ecological details for this species remain poorly documented.
Mixogaster breviventris
Slender Ant Fly
Mixogaster breviventris is a species of syrphid fly (family Syrphidae) in the subfamily Microdontinae. The species was described by Kahl in 1897. It is known by the common name Slender Ant Fly. As a member of the Microdontinae, it belongs to a group of hoverflies whose larvae are associated with ant colonies.
Mixogaster fattigi
Fattig's Ant Fly
Mixogaster fattigi is a species of ant-mimicking hoverfly (family Syrphidae, subfamily Microdontinae) described in 2019. The genus Mixogaster belongs to the tribe Microdontini, a group whose larvae are known to develop within ant colonies as inquilines or predators of ant brood. The specific epithet honors entomologist Delbert La Rue Fattig. The species is part of a lineage exhibiting remarkable morphological convergence with ants, representing an evolutionary strategy to avoid predation while foraging or accessing ant-associated resources.
Monoceromyia
Monoceromyia is a genus of hoverflies (Syrphidae) in the tribe Cerioidini. Species occur across the Afrotropical, Australasian, Neotropical and Oriental biogeographic regions. The genus is characterized by wasp-mimicking appearance and distinctive morphological traits including widely separated metapleura and modified antennal and abdominal structures.
Monoceromyia floridensis
Rufous Wasp Fly
Monoceromyia floridensis is a species of hoverfly in the family Syrphidae, described by Shannon in 1922. As a member of the tribe Cerioidini, it belongs to a group of wasp-mimicking syrphid flies. The species is known from Florida and surrounding regions of the southeastern United States. Like other members of its genus, it likely exhibits Batesian mimicry of stinging Hymenoptera, though specific biological details remain poorly documented in the available literature.
Myathropa
Myathropa is a genus of hoverflies (family Syrphidae) distributed across Europe, North Africa, and extending into parts of Asia. Adults are active from May to September and are frequently observed visiting flowers. The genus includes at least three described species: M. florea, M. semenovi, and M. usta. Some species exhibit Batesian mimicry of social wasps.
Myathropa florea
Batman hoverfly, Yellow-haired Sun Fly
Myathropa florea is a common Palearctic hoverfly in the tribe Eristalini, often called the Batman hoverfly due to the distinctive skull-like pattern on its thorax. Adults are active flower visitors from May to October and are notable for their wasp-mimicking appearance. The species has become adventive in western North America since 2005. Larvae develop in waterlogged organic detritus, particularly in tree rot holes.
Myolepta lunulata
Poplar-rot Pegleg
Myolepta lunulata is a species of syrphid fly (hoverfly) first described by Bigot in 1884. It belongs to the tribe Brachyopini within the subfamily Eristalinae. The species is known from limited observations, with records documented through iNaturalist and other biodiversity databases. Its common name, Poplar-rot Pegleg, suggests an association with decaying poplar wood and possibly distinctive leg morphology.
Myolepta nigra
Black Pegleg
Myolepta nigra, commonly known as the Black Pegleg, is a syrphid fly species found in the eastern and central United States and eastern Canada. Adults are flower-visiting hoverflies that feed on nectar and pollen. The larvae develop in rot holes of deciduous trees, making this species dependent on mature forest habitats with suitable tree cavities. It is considered uncommon throughout its range.
Myolepta pretiosa
Myolepta pretiosa is a hoverfly species in the family Syrphidae, described by Hull in 1923. It belongs to the tribe Brachyopini, a group characterized by larvae that develop in decaying wood and sap runs. The genus Myolepta comprises relatively uncommon species with limited documented observations.
Myolepta strigilata
Scaled Pegleg
Myolepta strigilata, commonly known as the Scaled Pegleg, is an uncommon syrphid fly found in the eastern and central United States. Adults are flower visitors that feed on nectar and pollen. The species is part of the hoverfly family, capable of sustained hovering flight. Larvae of the genus develop in rot holes of deciduous trees.
Myolepta varipes
Orange-banded Pegleg, Orange-banded Spineleg
Myolepta varipes is an uncommon syrphid fly found in the eastern United States. Adults visit flowers for nectar and pollen. The species is distinguished by orange banding on the legs. Larvae of the genus develop in rot holes of deciduous trees.
Nausigaster
Nausigaster is a genus of hoverflies (Syrphidae) endemic to the New World, containing approximately 15 described species. The genus was established by Williston in 1884. Larvae have been documented developing in decaying cacti and bromeliads, suggesting a specialized association with these plant substrates. Adult records span from Argentina to Mexico, with recent collections extending known distributions in Colombia and Argentina.
Nausigaster geminata
Armored Dimpleback
Nausigaster geminata is a species of hoverfly (family Syrphidae) in the subfamily Eristalinae, tribe Merodontini. It is commonly known as the Armored Dimpleback. The species was described by Townsend in 1897. As a syrphid fly, it likely exhibits typical hoverfly behaviors including flower visitation for nectar and pollen feeding, though specific biological details remain poorly documented in available sources.
Nausigaster scutellaris
Plain-winged Dimpleback
Nausigaster scutellaris is a species of hoverfly (Diptera: Syrphidae) in the tribe Merodontini, described by Adams in 1904. The common name "Plain-winged Dimpleback" has been assigned to this species on iNaturalist, though published biological information remains sparse. As a member of the subfamily Eristalinae, it belongs to a group of syrphid flies whose larvae typically develop in decaying organic matter or other moist substrates.
Nausigaster unimaculata
Single-spotted Dimpleback
A syrphid fly in the tribe Merodontini, characterized by a single prominent spot on the abdomen. The species is documented across multiple sources and has accumulated over 100 research-grade observations. It belongs to a genus of small hoverflies commonly known as dimplebacks.
Neoascia
Fen Flies
Neoascia is a genus of small hoverflies (Syrphidae) characterized by black and yellow or mostly black coloration with a narrow, wasp-like waist between the thorax and abdomen. Adults are typically found in damp, low-vegetation habitats including fens, marshes, and pond margins. The genus has a Holarctic distribution with records across Northern and Central Europe, Western Siberia, and Scandinavia. Larvae are saprophagous, developing in wet organic matter such as decaying vegetation, compost, and wet manure associated with aquatic margins.
Neoascia metallica
Double-banded Fen Fly
Neoascia metallica is a species of hoverfly (family Syrphidae) found across North America. Adults are commonly observed on flowers, where they feed on nectar and pollen. The species is known for its metallic coloration and association with wetland habitats. Larvae are aquatic, a trait that distinguishes this species from many other syrphid flies.
Neoascia tenur
Black-kneed Fen Fly
Neoascia tenur is a small Palearctic hoverfly in the family Syrphidae, commonly known as the Black-kneed Fen Fly. The species is strongly associated with wetland habitats across northern and central Europe, extending into Siberia. Adults are active from spring through early autumn and visit flowers of wetland plants. The larvae develop sub-aquatically within the stem sheaths of emergent aquatic vegetation such as cattails (Typha).
Neocnemodon
Smoothleg fly
Neocnemodon is a genus of hoverflies in the family Syrphidae, distributed across North America and Europe. Species in this genus are small to medium-sized flies with distinctive smooth legs, a trait reflected in their common name 'Smoothleg fly'. The genus was established by Goffe in 1944 and is classified within the tribe Pipizini. Larvae are known to be predatory, feeding on specific aphid species associated with various host plants.
Nuntianus cubanus
Nuntianus cubanus is a species of hoverfly (Diptera: Syrphidae) endemic to Cuba. Originally described as Baccha cubana by Hull in 1943, it was later transferred to the genus Nuntianus. The genus Nuntianus is a small group of Neotropical hoverflies characterized by elongated bodies and reduced wing venation. Information on the biology and ecology of this species remains limited.
Ocyptamus
Ocyptamus is a large and diverse genus of hoverflies (family Syrphidae) comprising over 200 species, predominantly distributed in the Neotropical region. The genus is not monophyletic and is paraphyletic with respect to Eosalpingogaster and Toxomerus; several subgenera have been elevated to full generic status (Hybobathus, Pelecinobaccha, Orphnabaccha, Pseudoscaeva). Many species await formal description, while others are likely to be synonymized upon further study.
Ornidia
jewel flies
Ornidia is a small genus of metallic hoverflies (Syrphidae) native to the New World. Species range from 2.3–4.2 mm in body length and display distinctive metallic coloration. Ornidia obesa, the most widespread species, has been introduced to the Pacific, Asia, and Africa through human commerce. The genus comprises four described species.
Ornidia obesa
Green Jewel Fly
Ornidia obesa is a metallic green syrphid fly widely distributed across the Americas and introduced to the Old World. Adults are frequently observed in association with decomposing organic matter, particularly animal feces and compost. The species has been documented as a host for pteromalid parasitoids and is noted for harboring bacteria of public health significance.
Orphnabaccha
Orphnabaccha is a genus of hoverflies (Syrphidae) in the tribe Syrphini, native to the Neotropical region. The genus was reinstated by Hull in 1949 and later redefined when molecular studies showed that the formerly broad genus Ocyptamus was not monophyletic, leading to the split of several distinct genera including Orphnabaccha.
Orphnabaccha coerulea
A species of hoverfly in the family Syrphidae, described by Williston in 1891. The genus Orphnabaccha is part of the diverse Syrphinae subfamily, whose members are commonly known as flower flies. Species in this genus are typically associated with tropical and subtropical regions of the Americas.
Orphnabaccha jactator
Yellow-legged Hover Fly
Orphnabaccha jactator is a species of hoverfly in the family Syrphidae, commonly known as the Yellow-legged Hover Fly. It belongs to a small genus of syrphid flies characterized by distinctive leg coloration. The species was described by Hermann Loew in 1861. Like other members of Syrphidae, it is likely a pollinator as an adult, though specific biological details remain poorly documented.
Orthonevra bellula
Three-lined Mucksucker
Orthonevra bellula is a rare species of syrphid fly in the family Syrphidae. The species was first described by Williston in 1882 as Chrysogater bellulus, with a lectotype later designated. It is one of three Nearctic Orthonevra species that extend into the Neotropical region. Adults are commonly found on flowers where they obtain nectar and pollen.
Orthonevra flukei
Fluke's Mucksucker
Orthonevra flukei is an uncommon syrphid fly species known from the Western United States. Males measure approximately 4.5 mm and females 5.5 mm. The species exhibits distinctive metallic coloration on the head and thorax, with complex wing venation patterns that include clouded areas and brown spots. Like other members of its genus, it possesses rat-tailed larvae, though specific larval habitat preferences for this species remain undocumented.
Orthonevra nitida
Wavy Mucksucker
Orthonevra nitida, commonly known as the Wavy Mucksucker, is a small syrphid fly (4–5 mm) native to eastern and central North America. It is one of three Nearctic Orthonevra species that extends into the Neotropical region. Adults are flower visitors, obtaining nectar and pollen from blooms. The species exhibits distinctive metallic coloration and wing markings that aid in identification. Larvae of this genus are of the rat-tailed type, though O. nitida larvae specifically have not been described.
Orthonevra pictipennis
Dusky-veined Mucksucker
Orthonevra pictipennis, known as the Dusky-veined Mucksucker, is an uncommon species of syrphid fly (hoverfly) in North America. Adults are small flower flies, measuring 5.5–6 mm in length, with distinctive metallic bronze-green and coppery coloration. The species shares much of its range with congeners O. pulchella, O. nitida, and O. feei. Larvae for this genus are of the rat-tailed type, though larvae of O. pictipennis specifically have not been described.
Palpada agrorum
Double-banded Plushback
Palpada agrorum is a common syrphid fly commonly known as the Double-banded Plushback. Adults are flower visitors that obtain nectar and pollen. Larvae are aquatic filter-feeders of the rat-tailed type, possessing an extensible posterior breathing siphon. The species was first described by Fabricius in 1787 and belongs to the agrorum species group within the genus Palpada.
Palpada albifrons
White-faced Plushback
Palpada albifrons is a rare species of syrphid fly (hoverfly) characterized by its distinctive white-faced appearance and aquatic larval stage. Adults are medium-sized flower flies commonly found on flowers, where they feed on nectar and pollen. The species has a disjunct distribution, occurring from Mexico northward along coastal areas of the United States, with additional records from South America. The larvae are aquatic rat-tailed maggots that inhabit organic-rich standing water.
Palpada mexicana
Golden Plushback
Palpada mexicana, commonly known as the Golden Plushback, is a species of hoverfly in the family Syrphidae. The species was originally described as Eristalis mexicanus by Macquart in 1847 and later transferred to the genus Palpada. As a member of the tribe Eristalini, its larvae are rat-tailed maggots adapted to aquatic or semi-aquatic environments with low oxygen levels. The species has been documented in 1,829 iNaturalist observations, indicating it is relatively well-represented in citizen science records.
Palpada pusilla
Bicolored Plushback
Palpada pusilla is a species of syrphid fly in the family Syrphidae, commonly known as the Bicolored Plushback. It is a member of the tribe Eristalini, which includes species whose larvae are known as "rat-tailed maggots" due to their distinctive posterior breathing siphon. The species has been documented across all 27 states of Brazil based on distribution records. Adult flies are pollinators that visit flowers, while larvae develop in organic-rich aquatic environments.
Palpada texana
Wide-eyed Plushback
Palpada texana is a species of hoverfly (family Syrphidae) in the tribe Eristalini. Like other members of its genus, it is associated with aquatic or semi-aquatic larval habitats typical of the Eristalina subtribe. The species was described by Hull in 1925. Adults are presumably pollinators, though specific behavioral observations for this species are limited.
Palpada undescribed-species-near-furcata
An undescribed species in the hoverfly genus Palpada, closely related to P. furcata. As a member of tribe Eristalini, its larvae are rat-tailed maggots—aquatic larvae with an extensible posterior breathing siphon that allows respiration while living in oxygen-poor, organic-rich waters. The genus Palpada includes species commonly found in urban, suburban, and rural areas in putrid standing water.
Paragus
Grass Skimmer Flies
Paragus is a genus of hoverflies (family Syrphidae) comprising over 100 species distributed worldwide except Antarctica. The genus is notable for its predatory larvae that feed on aphids, making it an important group for biological control. Adults are frequently observed visiting small flowering plants for nectar and pollen. Several subgenera are recognized, including Afroparagus, Pandasyopthalmus, Paragus, and Serratoparagus.
Paragus angustifrons
Narrow-faced Grass Skimmer
Paragus angustifrons is a species of hoverfly (Syrphidae) found in North America. Adults are commonly known as flower flies and visit flowers to obtain nectar and pollen. The species is considered uncommon. The larvae have been reared from aphids, specifically Aphis spiraecola and Aphis spiraephila, indicating a role as a predator of these agricultural pests.
Paragus haemorrhous
Black-backed Grass Skimmer, Common Grass Skimmer
Paragus haemorrhous is a small hoverfly species distributed across Europe, Africa, and the Nearctic. Adults are commonly found on flowers where they feed on nectar and pollen. The larvae are predatory, feeding on aphids on low herbaceous plants. The species is active from May through September and occupies diverse open habitats including grasslands, heathlands, and forest edges.
Parasyrphus
Bristleside Flies
Parasyrphus is a genus of hoverflies (Syrphidae) comprising 31 described species distributed across the Holarctic region. Adults are small to medium-sized (5.6–11 mm) with characteristic yellow abdominal markings. The genus exhibits notable larval trophic diversity: most known larvae are aphid predators on trees, while at least two species (P. nigritarsis and P. melanderi) are specialist predators of leaf beetle eggs and larvae. This dietary specialization is unusual among syrphid flies and involves sophisticated chemical ecology where predators exploit prey defensive secretions as foraging cues.
Parasyrphus genualis
Common Bristleside
Parasyrphus genualis is a species of hoverfly (family Syrphidae) described by Williston in 1887. It was originally described under the genus Syrphus before being moved to Parasyrphus. The species has been documented in North America with at least 21 observations on iNaturalist. As a member of Syrphidae, it belongs to a family known for pollination services and, in many species, predatory larvae that feed on aphids.
Parasyrphus relictus
Parasyrphus relictus is a hoverfly species (Diptera: Syrphidae) first described by Zetterstedt in 1838. The genus Parasyrphus comprises predatory hoverflies whose larvae feed on aphids. This species has been recorded in northern Europe, including Belgium, Denmark, and Norway. As with other members of its genus, it likely occupies temperate woodland and wetland habitats where aphid prey are abundant.
Parasyrphus semiinterruptus
Emarginate Bristleside
Parasyrphus semiinterruptus is a species of hoverfly in the family Syrphidae, first described by Fluke in 1935. The species is known by the common name Emarginate Bristleside. It belongs to the genus Parasyrphus, a group of small to medium-sized hoverflies. Available records for this species are limited, with few documented observations.
Parasyrphus tarsatus
Holarctic Bristleside
Parasyrphus tarsatus is a species of hoverfly (Syrphidae) first described by Zetterstedt in 1838. It is native to Europe, with confirmed records from Norway and Sweden. The species is part of the diverse genus Parasyrphus, which comprises predatory syrphid flies whose larvae feed on aphids. Adults are likely active during the warmer months, though specific phenological details remain poorly documented.
Parhelophilus divisus
Yellow-legged Bog Fly
Parhelophilus divisus is a rare syrphid fly species known as the yellow-legged bog fly, documented primarily from the northeastern United States. The species exhibits the characteristic hoverfly ability to remain nearly motionless in flight. Adults are flower-associated, feeding on nectar and pollen, while larvae possess the distinctive long-tailed "rat-tailed" morphology typical of many Eristalinae.
Parhelophilus integer
Shiny Bog Fly
Parhelophilus integer, commonly known as the shiny bog fly, is a rare syrphid fly species found in the Eastern United States. Adults are flower-associated, feeding on nectar and pollen. The species exhibits typical hoverfly flight behavior, capable of remaining nearly motionless in flight. Larvae develop in aquatic or semi-aquatic environments with the characteristic long-tailed 'rat-tailed' morphology shared by other members of the genus.
Parhelophilus laetus
Common Bog Fly
Parhelophilus laetus is a hoverfly species in the family Syrphidae, commonly known as the Common Bog Fly. It is associated with wetland habitats, particularly bogs and marshes. The species is found in North America, with records from the northeastern United States and adjacent Canada.
Parhelophilus obsoletus
Unadorned Bog Fly
Parhelophilus obsoletus is a species of hoverfly (family Syrphidae) found across Canada and the northeastern and central United States. Adults are commonly observed on flowers, where they feed on nectar and pollen. The species is considered fairly common within its range. The larval stage remains undescribed.
Parhelophilus rex
Dusky Bog Fly
Parhelophilus rex, commonly known as the Dusky Bog Fly, is a syrphid fly species described by Curran and Fluke in 1922. It occurs in northern North America and is considered fairly common within its range. Like other hoverflies, adults are capable of nearly motionless flight and are frequently observed visiting flowers for nectar and pollen. The larval stage remains undescribed.
Pelecinobaccha
A genus of hoverflies in the family Syrphidae, endemic to the Neotropical region. Formerly treated as part of the paraphyletic genus Ocyptamus, it was reinstated as a distinct genus based on phylogenetic evidence. The genus contains four species groups and approximately 49 species, many described in a 2014 revision. Adults are presumably pollinators like other syrphid flies, though specific biological data remain poorly documented.
Pelecinobaccha costata
Cobalt Hover Fly
Pelecinobaccha costata, commonly known as the cobalt hover fly, is a North American hoverfly in the family Syrphidae. The species is recognized by its distinctive coloration and is distributed across southern Ontario and the eastern United States. Its larvae are specialized predators of scale insects, making it a beneficial species in agricultural and natural ecosystems.
Pelecocera
Pelecocera is a Holarctic genus of small hoverflies (Syrphidae) comprising approximately 14 species. Adults are typically black and yellow or orange, found primarily in heathland and conifer forest habitats. Larval biology has been historically poorly known, but recent studies confirm mycophagy in at least two species, with larvae developing inside the hypogean fungal fruit bodies of Rhizopogon luteolus.
Pelecocera pergandei
Eastern Bighorn Fly
Pelecocera pergandei is a species of syrphid fly commonly known as the Eastern Bighorn Fly. It belongs to the tribe Rhingiini within the hoverfly family Syrphidae. The species was first described by Samuel Wendell Williston in 1884. Records of this species remain sparse, with limited observational data available.
Pipiza
Pitheads
Pipiza is a genus of hoverflies (Syrphidae) containing approximately 12 European species. Adults are predominantly dark-colored and resemble small bees or wasps. The genus is notable for its specialized larval ecology: larvae are predaceous, feeding exclusively on gall-forming aphids on foliage. Species show strong association with forested landscapes, particularly deciduous forests and forest edges. Climate modeling indicates high distributional stability across Europe, with potential northward shifts in species diversity.
Pipiza femoralis
White-haired Pithead
Pipiza femoralis is a species of syrphid fly (hoverfly) first described by Loew in 1866. It belongs to the tribe Pipizini, a group of small to medium-sized hoverflies. The common name "White-haired Pithead" has been recorded for this species. As with other members of the genus Pipiza, it is likely associated with decaying organic matter and aphid honeydew as adult food sources, though specific ecological details remain poorly documented.
Pipiza puella
Sumac Gall Pithead
Pipiza puella is a small hoverfly (Syrphidae) known by the common name 'sumac gall pithead.' Adults are active flower visitors, feeding on nectar and pollen. The species has been documented in eastern and central North America as well as Norway. Larvae are reported to be aphid predators, though detailed life history information remains limited.
Pipiza quadrimaculata
Four-spotted Pipiza
Pipiza quadrimaculata is a hoverfly species in the family Syrphidae, first described by Georg Wolfgang Franz Panzer in 1802. The species epithet "quadrimaculata" (meaning "four-spotted") refers to characteristic markings on the wings or body. It belongs to the tribe Pipizini, a group of small to medium-sized hoverflies often associated with woodland and wetland habitats. The species has been recorded in Belgium with presence confirmed across multiple administrative regions.
Pipizinae
Pitheads & Kin
Pipizinae is a subfamily of hoverflies (Syrphidae) containing approximately 70 species across eight extant genera. Formerly classified as a tribe within Eristalinae, molecular phylogenetic studies published in 2015 reinstated it as a distinct subfamily, sister to Syrphinae. Members are small to medium-sized flies, predominantly black in coloration with some species displaying orange abdominal markings. The subfamily is notable for its specialized larval predation on aphids, particularly wax-secreting species.
Platycheirus
Sedgesitters
Platycheirus is a large genus of hoverflies (family Syrphidae) commonly known as sedgesitters. The genus was established in 1828 and is primarily Holarctic in distribution, with approximately 110 species in the Palearctic and 70 in the Nearctic region. Species are slender, small to medium-sized flies, often with distinctive leg modifications in males used for species identification.
Platycheirus confusus
Confusing Sedgesitter
Platycheirus confusus, commonly known as the Confusing Sedgesitter, is a species of hoverfly in the family Syrphidae. The species exhibits a disjunct distribution with separate eastern and western North American populations. Larvae have been successfully reared on the balsam woolly adelgid (Adelges piceae), indicating a predatory lifestyle. Adults are medium-sized syrphid flies with distinctive morphological features useful for identification.
Platycheirus hyperboreus
Pearly Sedgesitter
Platycheirus hyperboreus, commonly known as the Pearly Sedgesitter, is a small hoverfly (Syrphidae) distributed across boreal and arctic regions of North America and northern Europe. Adults are 5.3–8.7 mm in length and exhibit distinctive abdominal patterning with pale spots on dark segments. The species is recognized by its modified front legs, which are yellow with gradually dilated tibiae—an adaptation associated with its common name. It occurs in northern latitudes ranging from Alaska and Greenland through Scandinavia to northern Siberia.
Platycheirus kelloggi
Broad-bodied Sedgesitter
Platycheirus kelloggi is a rare species of hoverfly (family Syrphidae) endemic to western North America. The species is distinguished by its broad, oval abdomen with dull orange spots and distinctive leg morphology in males. It has been documented from Alaska south to southern California and in the Rocky Mountains, including Canada.
Platycheirus quadratus
Platycheirus quadratus is a species of hoverfly (family Syrphidae) described by Thomas Say in 1823. It belongs to the genus Platycheirus, a diverse group of small to medium-sized hoverflies commonly found in temperate regions. The species is recognized as valid and accepted in current taxonomic databases. Like other syrphid flies, adults are likely pollinators that visit flowers for nectar.
Platycheirus scutatus
hoverfly
Platycheirus scutatus is a very common Holarctic hoverfly with a wide distribution across the Northern Hemisphere. Adults are notable pollinators that feed on diverse flowers, while larvae are aphid predators. The species has an exceptionally long flight period and may remain active during cold weather. Multiple broods occur throughout warmer months.
Platycheirus stegnus
Greater Punctate Sedgesitter
Platycheirus stegnus is a hoverfly (Syrphidae) commonly known as the Greater Punctate Sedgesitter. It belongs to a genus characterized by elongated legs and distinctive wing venation. Like other syrphids, adults are likely nectar feeders, though specific ecological details remain poorly documented. The species was described by Thomas Say in 1829.
Platycheirus thylax
Yellow-legged Sedgesitter
Platycheirus thylax is a species of hoverfly in the family Syrphidae, described by Hull in 1944. It is commonly known as the Yellow-legged Sedgesitter. Like other members of the genus Platycheirus, it is a small fly associated with wetland vegetation. The species is rarely recorded, with only two observations documented on iNaturalist.
Pocota bomboides
American Pocota
Pocota bomboides is a species of hoverfly (family Syrphidae) native to North America. The species name "bomboides" suggests a resemblance to bumble bees (Bombus), indicating likely Batesian mimicry. As a member of the subfamily Eristalinae, it belongs to a diverse group of flower-visiting flies. Very little specific biological information has been published for this species.
Polybiomyia bellardii
Red-legged Wasp Fly
A small hoverfly (Syrphidae) known for its striking wasp-mimicking appearance. The species exhibits Batesian mimicry of vespid wasps, with a slender body and contrasting coloration. Adults have been documented across multiple observations, though detailed biological studies remain limited. The common name refers to its distinctive red leg coloration.
Polybiomyia macquarti
Short-horned Wasp Fly
Polybiomyia macquarti is a species of hoverfly in the family Syrphidae, first described by Shannon in 1925. It is known by the common name Short-horned Wasp Fly. As a member of the tribe Cerioidini, it belongs to a group of syrphid flies that exhibit wasp mimicry. The species is documented in the Catalogue of Life and GBIF with accepted taxonomic status. Available records from iNaturalist indicate it is rarely observed, with only 12 documented observations.
Polybiomyia townsendi
Yellowshield Wasp Fly
Polybiomyia townsendi is a species of hoverfly in the family Syrphidae, subfamily Eristalinae, tribe Cerioidini. It is commonly known as the Yellowshield Wasp Fly. The species was described by Snow in 1895 and is currently accepted as valid. Like other members of the genus Polybiomyia, it is a wasp-mimicking syrphid fly. The genus belongs to a group of hoverflies that exhibit Batesian mimicry of stinging Hymenoptera.
Polydontomyia
dimorphic sickleleg
Polydontomyia is a monotypic genus of hoverflies (family Syrphidae) containing a single species, Polydontomyia curvipes. The genus was established by Williston in 1896 and was formerly classified under Lejops. The species is commonly known as the dimorphic sickleleg, a reference to its distinctive leg morphology.
Polydontomyia curvipes
Dimorphic Sickleleg
Polydontomyia curvipes, commonly known as the dimorphic sickleleg, is a species of hoverfly (family Syrphidae) and the sole member of its monotypic genus. Formerly classified under Lejops, it was reassigned to the resurrected genus Polydontomyia based on morphological and phylogenetic evidence. The species exhibits sexual dimorphism in leg structure, with males possessing the distinctive curved hind legs referenced in its specific epithet. As a member of the Eristalini tribe, it is associated with aquatic or semi-aquatic larval habitats typical of rat-tail maggot flies.
Pseudoscaeva
Pseudoscaeva is a genus of hoverflies (family Syrphidae) endemic to the Neotropical region. The genus was erected by Vockeroth in 1969 to accommodate species formerly placed in Ocyptamus, which was determined to be polyphyletic. Four species are currently recognized: P. diversifasciata, P. meridionalis, P. schoenemanni, and P. sericea. At least one species, P. meridionalis, has been introduced to Chile and is considered potentially invasive.
Pseudoscaeva diversifasciata
Silver-banded Hover Fly
Pseudoscaeva diversifasciata, commonly known as the Silver-banded Hover Fly, is a species of hoverfly in the family Syrphidae. The genus Pseudoscaeva contains relatively few species and is distinguished from the similar genus Scaeva by subtle morphological differences. This species exhibits Batesian mimicry of stinging Hymenoptera, a common trait among syrphid flies. Observations suggest it occurs in the Americas, though detailed natural history documentation remains limited.
Pterallastes
Pterallastes is a genus of bee-mimicking hoverflies (family Syrphidae) described by Loew in 1863. The genus contains four recognized species with a disjunct distribution: one species in North America (P. thoracicus), one in Japan (P. unicolor), and two in China (P. bomboides, P. bettyae). These flies exhibit Batesian mimicry of bees, a common defensive strategy in the subfamily Eristalinae.
Pterallastes thoracicus
goldenback fly, Orangeback syrphid fly
Pterallastes thoracicus is a syrphid fly commonly known as the goldenback fly or orangeback syrphid fly. It is an uncommon species observed across central and eastern United States, with recent records expanding its known range into Canada. Adults are associated with flowers, where they feed on nectar and pollen. The larvae of this species remain unknown.
Pyritis
Pyritis is a genus of hoverflies in the family Syrphidae, established by Hunter in 1897. The genus contains at least one confirmed species, P. kincaidii, described by Coquillett in 1895. As a member of the tribe Eristalini, it belongs to a group of flower-visiting flies commonly known as drone flies. The genus remains poorly documented in scientific literature, with limited published information on its biology and ecology.
Pyritis kincaidii
Halcyon
Pyritis kincaidii is a hoverfly species (Diptera: Syrphidae) in the tribe Eristalini. It is known by the common name "Halcyon" and was described by Coquillett in 1895. As a member of Syrphidae, it likely participates in pollination services, though specific ecological details for this species remain limited in available sources.
Pyrophaena granditarsis
Hornhand Sedgesitter
Pyrophaena granditarsis is a small hoverfly in the family Syrphidae, commonly known as the Hornhand Sedgesitter. The species is recognized by its distinctive enlarged hind tarsi in males. It is associated with wetland habitats, particularly sedge-dominated areas. The species has been documented across northern temperate regions with 463 iNaturalist observations.
Rhingia nasica
American Snout Fly
Rhingia nasica is a North American species of hoverfly in the family Syrphidae. Adults are recognized by their distinctive elongated snout, a trait shared with other members of the genus Rhingia. Larval development occurs in association with animal dung. The species is commonly observed across the eastern and central United States.
Rhopalosyrphus guentherii
Hairy-bellied Squeezetail
Rhopalosyrphus guentherii is a species of hoverfly (family Syrphidae) in the subfamily Microdontinae, known by the common name Hairy-bellied Squeezetail. It is one of approximately 11 described species in the genus Rhopalosyrphus, a group characterized by unusual larval biology associated with ant colonies. The species was described by Lynch Arribálzaga in 1891 from South American material. As a microdontine syrphid, it likely exhibits the myrmecophilous lifestyle typical of its subfamily, though specific details for this species remain poorly documented.
Rhopalosyrphus ramulorum
Bare-bellied Squeezetail
Rhopalosyrphus ramulorum is a species of hoverfly in the family Syrphidae, described by Weems and Deyrup in 2003. It belongs to the subfamily Microdontinae, a group known for their unusual larval biology involving association with ant colonies. The species is known by the common name Bare-bellied Squeezetail. Information about this species remains limited, with only five documented observations on iNaturalist as of the knowledge cutoff.
Scaeva
Scaeva is a genus of hoverflies (family Syrphidae) comprising approximately seven described species distributed across the Palaearctic region. The genus has been subject to taxonomic revision alongside related genera Simosyrphus and Ischiodon. Adults are pollinators, while larvae are predominantly aphidophagous predators. Scaeva pyrastri has been extensively studied for its biological control potential against agricultural aphid pests.
Sericomyia
Pond Flies
Sericomyia is a genus of large hoverflies in the family Syrphidae, commonly known as pond flies. Species within this genus are notable bee mimics, displaying both short-pile and long-pile coloration patterns. The genus is widespread across boreal forests of the Holarctic region, extending southward at higher elevations into the Oriental and Neotropical regions. Larvae are of the rat-tailed maggot type, specialized for aquatic life in oxygen-poor environments.
Sericomyia bifasciata
Long-nosed Pond Fly
Sericomyia bifasciata, commonly known as the Long-nosed Pond Fly, is an uncommon species of syrphid fly described by Williston in 1887. It belongs to the genus Sericomyia, whose larvae are known as "rat-tailed maggots" with long breathing siphons adapted to aquatic environments. However, the larvae of this particular species remain unknown. Adults have been observed in the northeastern part of North America.
Sericomyia carolinensis
Two-spotted Pond Fly
Sericomyia carolinensis is a rare hoverfly (Syrphidae) endemic to the southeastern United States. Adults are distinguished by an all-yellow face, paired narrow yellow spots on the abdomen, and a yellow pilose scutellum. The species has been observed feeding on pear blossoms. Though the larval stage remains undocumented, it likely possesses the 'rat-tailed' morphology characteristic of the genus, inhabiting nutrient-rich aquatic environments such as bog mat pools.
Sericomyia chalcopyga
Sericomyia chalcopyga is a species of syrphid fly (hoverfly) in the family Syrphidae. As a member of the tribe Sericomyiini, its larvae are "rat-tailed maggots" with extensible posterior breathing siphons adapted to aquatic environments. The species was described by Loew in 1863. Like other Sericomyia species, adults are pollinators that visit flowers for nectar and pollen.
Sericomyia harveyi
Harvey's Pond Fly
Sericomyia harveyi is a hoverfly species in the family Syrphidae, subfamily Eristalinae. The genus Sericomyia is part of the tribe Milesiini and is characterized by larvae that inhabit bog mat pools and other wetland habitats. Adults are pollinators that visit flowers for nectar and pollen. The species was described by Osburn in 1908.
Sericomyia lata
White-spotted Pond Fly
Sericomyia lata is a syrphid fly commonly known as the White-spotted Pond Fly. Adults are medium-sized hoverflies, 11.6–15.2 mm in length, with distinctive black bodies and large white abdominal spots. The species is widespread across North America, with highest concentrations in eastern regions. Like other members of its genus, the larvae develop in aquatic or semi-aquatic habitats and possess the characteristic rat-tailed breathing siphon typical of Sericomyia.
Sericomyia militaris
Narrow-banded Pond Fly
Sericomyia militaris, commonly called the narrow-banded pond fly, is a North American syrphid fly (hoverfly) found across northern regions of the continent. Adults range from 11.7–17.1 mm in length and are primarily black with narrow yellow abdominal markings. The species belongs to a genus whose larvae are known as rat-tailed maggots, possessing a distinctive posterior breathing siphon.
Sericomyia nigra
Polar Pond Fly
Sericomyia nigra is a species of hoverfly (family Syrphidae) described by Portschinsky in 1873. It belongs to the tribe Milesiini within subfamily Eristalinae. The species is known from Scandinavia (Norway and Sweden) based on distribution records. As a member of the genus Sericomyia, its larvae likely develop in bog mat pools, though this specific habitat association has not been directly documented for S. nigra itself. Adults are presumably pollinators, as is characteristic of the family.
Sericomyia sexfasciata
Six-banded Pond Fly
Sericomyia sexfasciata is a species of syrphid fly (family Syrphidae) commonly known as the Six-banded Pond Fly. It belongs to the subfamily Eristalinae and tribe Milesiini. Like other members of its genus, the larvae develop in aquatic or semi-aquatic habitats. The species was first described by Francis Walker in 1849.
Sericomyia slossonae
Slosson's Pond Fly
Sericomyia slossonae is a species of hoverfly (family Syrphidae) in the tribe Milesiini. The genus Sericomyia is part of the group commonly known as "rat-tailed maggots" due to their larvae possessing an extensible posterior breathing siphon. Larvae of Sericomyia species are known to inhabit bog mat pools. Adults are pollinators that visit flowers for nectar and pollen. The species was described by Curran in 1934 and is accepted as valid.
Sericomyia tolli
Great-nosed Pond Fly
Sericomyia tolli is a species of hoverfly (family Syrphidae) described by Frey in 1915. It belongs to the genus Sericomyia, whose larvae are known as 'rat-tailed maggots' and inhabit aquatic environments. The species is poorly documented in scientific literature, with minimal observational records available.
Sericomyia transversa
Yellow-spotted Pond Fly
Sericomyia transversa is an uncommon syrphid fly found in northeastern North America. Adults, known as hoverflies or flower flies, are capable of nearly motionless flight and are commonly observed visiting flowers for nectar and pollen. The species belongs to a genus whose larvae are known as rat-tailed maggots, possessing an extensible posterior breathing siphon that allows them to inhabit aquatic environments. The species was first described by Osburn in 1926.
Sericomyia vockerothi
Vockeroth's Pond Fly
Sericomyia vockerothi is a species of hoverfly in the family Syrphidae, described by Skevington in 2012. The genus Sericomyia belongs to the tribe Milesiini (formerly Sericomyiini), a group whose larvae are known as "rat-tailed maggots" due to their distinctive posterior breathing siphon. Larvae of related Sericomyia species inhabit bog mat pools and other aquatic environments with organic matter. Adults are pollinators that visit flowers for nectar and pollen. The species is poorly documented in public sources, with only five observations recorded on iNaturalist as of the available data.
Sericomyia woodi
Sericomyia woodi is a species of hoverfly in the family Syrphidae, described by Nielsen and Vockeroth in 2000. As a member of the genus Sericomyia, it belongs to a group of large, often wasp-mimicking hoverflies commonly known as bog or fen flies due to their typical wetland associations. The species epithet 'woodi' honors Nelson R. Wood, a taxidermist at the U.S. National Museum who collected the type specimen in 1912.
Sericomyiina
Sericomyiina is a subtribe of hoverflies within the family Syrphidae. Members are small to medium-sized flies, often with metallic coloration. The subtribe includes the genera Sericomyia and Arctophila, which are found primarily in temperate and boreal regions.
Somula decora
spotted wood fly
Somula decora, commonly called the spotted wood fly, is an uncommon syrphid fly species found in central to eastern North America. Adults are medium-sized, roughly honey bee-sized, with black bodies heavily marked with golden yellow. The species exhibits wasp mimicry, likely resembling scoliid wasps or queen yellowjackets. Larvae develop in decaying wood, while adults visit flowers for nectar and pollen.
Sphaerophoria philanthus
Black-footed Globetail
Sphaerophoria philanthus is a species of syrphid fly, commonly known as the Black-footed Globetail. It belongs to the family Syrphidae, a diverse group of flower-visiting flies often called hoverflies due to their ability to remain stationary in flight. The species is documented from Europe, though specific details about its biology and ecology remain limited in available sources. Like other members of the genus Sphaerophoria, it likely exhibits sexual dimorphism in abdominal patterning, a characteristic feature of this group.
Sphecomyia cryptica
Sphecomyia cryptica is a species of hoverfly (Diptera: Syrphidae) described in 2019 from the genus Sphecomyia, a group of large wasp-mimicking flies in the subtribe Criorhinina. It belongs to the S. pattonii species group, characterized by the absence of pruinose scutellar vittae. The species exhibits distinctive abdominal patterning with pruinose sternites and yellow-banded tergites. As a member of this Holarctic genus, it likely functions as a pollinator in its adult stage. Biological data remain limited due to its recent description.
Sphecomyia dyari
Dyar's Yellowjacket Fly
Sphecomyia dyari is a species of syrphid fly (family Syrphidae) known for its striking resemblance to yellowjacket wasps. It belongs to a genus notable for exceptionally convincing wasp mimicry, including elongated antennae and flight patterns that imitate queen yellowjackets searching for nest sites. The species was described by Shannon in 1925 and is found in the United States. Like other members of its genus, it likely serves as a Batesian mimic, gaining protection from predators by resembling stinging wasps.
Sphecomyia hoguei
Sphecomyia hoguei is a species of syrphid fly (flower fly) described in 2019, belonging to the S. pattonii species group within the genus Sphecomyia. Like other members of its genus, it exhibits wasp mimicry, a characteristic defensive adaptation in this lineage. The species was formally described in a comprehensive taxonomic revision of the world Sphecomyia fauna.
Sphecomyia interrupta
Sphecomyia interrupta is a species of hoverfly (family Syrphidae) described in 2019. It is a large wasp mimic within the Holarctic genus Sphecomyia, belonging to the S. vittata species group. The species is characterized by distinctive morphological features including a completely pruinose scutellum without a black posterior rim, an interrupted medial facial vitta, and specific antennal segment proportions. Like other members of subtribe Criorhinina, it likely exhibits Batesian mimicry of stinging wasps.
Sphecomyia metallica
Sphecomyia metallica is a species of hoverfly in the family Syrphidae. It is a wasp mimic, part of a diverse group of syrphid flies that have evolved to resemble stinging hymenopterans for protection from predators. The species is known from Canada and the United States. As with many hoverflies, adults likely visit flowers for nectar and pollen.
Sphecomyia oraria
Sphecomyia oraria is a species of hoverfly (Syrphidae) described in 2019. It belongs to the S. pattonii species group within the Holarctic genus Sphecomyia, which comprises large wasp-mimicking flies in subtribe Criorhinina. The species exhibits Batesian mimicry of vespid wasps, particularly yellowjackets. Like other members of its genus, it is presumed to have larvae that develop in rotting wood or tree holes, though this has not been confirmed for S. oraria specifically.
Sphecomyia pattonii
Patton's Yellowjacket Fly
Sphecomyia pattonii is a large wasp-mimicking syrphid fly in the subtribe Criorhinina, originally described by Williston in 1882. It belongs to the S. pattonii species group, distinguished from congeners by the absence of pruinose scutellar vittae. The species exhibits classic yellowjacket mimicry, including coloration, body form, and flight behavior similar to Vespula queens. As with other members of its subtribe, the larval stage likely develops in decaying wood or rot holes, though this remains unconfirmed for this species.
Sphecomyia pseudosphecomima
Sphecomyia pseudosphecomima is a species of hoverfly (Diptera: Syrphidae) described by Moran in 2019. It belongs to the genus Sphecomyia, a Holarctic group of large wasp-mimicking syrphid flies. The species is placed in the S. pattonii species group, characterized by the absence of pruinose scutellar vittae and broadened fore tarsi. Like other members of its genus, it exhibits Batesian mimicry of vespid wasps, though specific details of its biology remain undocumented.
Sphecomyia vittata
Long-horned Yellowjacket Fly
Sphecomyia vittata is a large, striking syrphid fly known for its exceptional mimicry of yellowjacket wasps. It possesses unusually long, thick antennae for a fly—longer than the head depth in lateral view—which enhances its resemblance to vespid wasps. The species belongs to the S. vittata species group within subtribe Criorhinina, characterized by pruinose scutellar vittae and specific thoracic pruinosity patterns. Adults are flower visitors, though detailed natural history remains poorly documented. The species has a Holarctic distribution with concentration in eastern North America.
Sphecomyia weismani
Sphecomyia weismani is a hoverfly species described in 2019, one of seven new species identified during a comprehensive revision of the genus Sphecomyia. It belongs to the S. pattonii species group, distinguished from other Sphecomyia by the absence of pruinose scutellar vittae. The species is a wasp mimic, exhibiting the characteristic large size and yellow-and-black coloration typical of this Holarctic genus. Like other members of subtribe Criorhinina, it likely develops in decaying wood or rot holes, though specific larval biology remains undocumented.
Sphegina
Pufftails
Sphegina is a genus of small, slender hoverflies (Syrphidae) known as 'pufftails' due to their distinctive appearance in flight. Adults are widespread across Eurasia and North America, typically found in damp, shaded forest habitats near water. The genus exhibits pronounced sexual dimorphism in antennal structure and is distinguished from its sister group Neoascia by facial pilosity, katepisternal setation, and antennal proportions. Larvae develop in association with wood-boring insects, utilizing sap flows and decaying cambium in moist conditions.
Sphegina brachygaster
Thick-waisted Pufftail
Sphegina brachygaster, known as the Thick-waisted Pufftail, is a syrphid fly species described by Hull in 1935. It is fairly common in the eastern United States. Adults visit flowers for nectar and pollen. Larvae develop in decaying sap accumulations under bark in wet woodland environments.
Sphegina campanulata
Orange-horned Hammertail, Orange-horned Pufftail
Sphegina campanulata is a syrphid fly (hoverfly) species described by Robertson in 1901. It is fairly common in the northeastern United States. The species is known for its distinctive orange-horned appearance and is one of approximately 45 observations documented on iNaturalist. Like other members of the genus Sphegina, it exhibits the characteristic hovering flight ability common to syrphid flies.
Sphegina lobata
Yellow-lobed Pufftail
Sphegina lobata, commonly known as the Yellow-lobed Pufftail, is an uncommon species of hoverfly in the family Syrphidae. First described by Loew in 1863, this species is found in northeastern North America. Adults are flower visitors, while larvae develop in decaying sap accumulations under bark in moist woodland habitats.
Sphegina rufiventris
Black-horned Pufftail
Sphegina rufiventris is a common syrphid fly species found in the northeastern United States. Adults are commonly observed on flowers, where they feed on nectar and pollen. The species is notable for its ability to hover nearly motionless in flight, a trait shared with other hoverflies. Larvae develop in specialized microhabitats, specifically accumulations of decaying sap under bark in moist environments.
Sphiximorpha cylindrica
Sphiximorpha cylindrica is a species of hoverfly in the family Syrphidae, described by Curran in 1921. It belongs to the tribe Cerioidini within the subfamily Eristalinae. The genus Sphiximorpha is known for species that exhibit Batesian mimicry, resembling stinging Hymenoptera such as wasps or bees. As with other members of this genus, S. cylindrica likely possesses a cylindrical body form consistent with its specific epithet.
Spilomyia alcimus
Broad-banded Hornet Fly
Spilomyia alcimus is a syrphid fly first described by Walker in 1849. It exhibits wasp mimicry, resembling yellowjackets in appearance, sound, and behavior. Adults visit flowers for nectar and pollen. The species is uncommon and distributed across Canada and the United States.
Spilomyia interrupta
Interrupted Hornet Fly
Spilomyia interrupta, commonly known as the Interrupted Hornet Fly, is a species of hoverfly in the family Syrphidae. First described by Williston in 1882, this uncommon species is native to western North America, particularly along the California coast. Like other members of the genus Spilomyia, it exhibits remarkable mimicry of yellowjacket wasps, including similar coloration, body shape, and even wingbeat frequency. Adults visit flowers for nectar and pollen, while larvae develop in moist tree rot holes.
Spilomyia liturata
Rocky Mountain Hornet Fly
Spilomyia liturata, commonly known as the Rocky Mountain Hornet Fly, is an uncommon species of hoverfly (Syrphidae) found in western North America. Adults are notable mimics of yellowjacket wasps, exhibiting sophisticated visual and auditory deception. The species is associated with montane habitats along the Rocky Mountains, where larvae develop in water-filled tree holes.
Spilomyia sayi
Four-lined Hornet Fly
Spilomyia sayi is a common North American hoverfly and wasp mimic, ranging from western Canada to the northeastern United States. Adults are active from June to October and are frequently found on flowers where they feed on nectar and pollen. The species exhibits remarkable mimicry of yellowjacket wasps, including visual, behavioral, and acoustic deception. Larvae develop in decaying heartwood of deciduous trees and in rot holes.
Syritta
Syritta is a genus of hoverflies (family Syrphidae) with approximately 18 recognized species. The genus likely originated in the Afrotropical region, where the majority of species diversity occurs. Only six species are known from the Palearctic region, with two species—S. flaviventris and S. pipiens—occurring in North America, probably introduced by humans. S. pipiens is the most widespread and commonly encountered species, distributed across Eurasia and North America.
Syritta pipiens
Thick-legged Hoverfly, Thick-legged Hover Fly
Syritta pipiens is a common and widespread hoverfly in the family Syrphidae, native to Europe and now distributed across Eurasia and North America. It is distinguished by its enlarged hind femora, which give rise to its common name 'thick-legged hoverfly.' Adults are fast, agile fliers rarely exceeding one meter above ground and are important pollinators of diverse flowering plants. Larvae develop in moist, decaying organic matter including compost, manure, and silage. The species is frequently found in human-modified environments such as gardens, farmland, and urban parks.
Syrphinae
Typical Hover Flies
Syrphinae is one of three subfamilies in the hoverfly family Syrphidae, containing over 1,600 species. The subfamily is monophyletic and primarily comprises aphidophagous species, with larvae that prey on aphids and other small Hemiptera. Adults are common flower visitors and important pollinators. A minority of species exhibit alternative larval feeding strategies, including phytophagy.
Syrphus
Common Flower Flies
Syrphus is a genus of hoverflies in the family Syrphidae, characterized by distinctive calypter morphology. The genus is distinguished from other Syrphini by long hairs on the upper surface of the lower lobe of the calypter, a unique diagnostic feature. Adults are common flower visitors and pollinators, while larvae are primarily aphid predators. The genus includes approximately 20 described species distributed across the Holarctic region, with several species occurring in North America and Europe.
Syrphus attenuatus
Yellow-margined Flower Fly
Syrphus attenuatus is a species of hoverfly (family Syrphidae) described by Hine in 1922. As a member of the subfamily Syrphinae, its larvae are presumed aphid predators, though this specific life history has not been directly documented for this species. The species is known from Norway and Sweden according to distribution records, and is referred to by the common name "Yellow-margined Flower Fly." Like other Syrphus species, adults likely visit flowers for nectar and pollen.
Syrphus ribesii
Common Banded Hoverfly
Syrphus ribesii is a common Holarctic hoverfly and an effective aphid predator in both agricultural and natural ecosystems. Adults are frequent flower visitors, feeding on nectar and pollen while providing pollination services. The species is highly migratory and shows remarkable adaptability to diverse habitats from farmland to forest. Two distinct chromosome races exist across much of Europe.
Syrphus vitripennis
Black-thighed Flower Fly
Syrphus vitripennis is a common Holarctic hoverfly (Syrphidae) with distinctive yellow and black wasp-mimicking coloration. Adults are medium-sized (8–11 mm body length, wing length 7.25–10.25 mm) and frequent flowers from March to October, peaking in July–August. Larvae are aphid predators, making this species economically significant for biological control. The species is highly migratory, with documented seasonal movements between latitudes. It is one of five Syrphus species in Britain and can be difficult to distinguish from congeners, particularly S. rectus in males.
Temnostoma alternans
Wasp-like Falsehorn
Temnostoma alternans, commonly known as the Wasp-like Falsehorn, is a species of syrphid fly found throughout northern and central United States and Canada. Adults are flower-visiting hoverflies that obtain nectar and pollen from blossoms. The species exhibits elaborate mimicry of solitary mason wasps, including darkened wing margins that resemble the folded wings of vespid wasps and distinctive leg-waving behavior that mimics wasp antennae. Larvae develop in moist decayed wood.
Temnostoma balyras
Yellow-haired Falsehorn
Temnostoma balyras, commonly known as the Yellow-haired Falsehorn, is a syrphid fly species found in eastern North America. Adults are flower visitors that feed on nectar and pollen. The species exhibits elaborate mimicry of solitary mason wasps, including darkened wing margins and behavioral adaptations. Larvae develop in moist decayed wood, where they use thoracic hooks as rasping organs to burrow.
Temnostoma daochus
Yellow-spotted Falsehorn
Temnostoma daochus is a rare syrphid fly species in the eastern United States, notable for its elaborate Batesian mimicry of solitary mason wasps. It exhibits both morphological and behavioral mimicry, including darkened wing edges that imitate vespid wing folds and deliberate foreleg movements that mimic wasp antennae. The species is closely related to T. barberi, with which it forms a lineage sister to the rest of the genus. Larvae develop in moist decayed wood.
Teuchocnemis bacuntius
Orange Spur Fly
Teuchocnemis bacuntius is a rare species of syrphid fly in the family Syrphidae, commonly known as the Orange Spur Fly. Adults are medium-sized hoverflies distinguished by orange coloration and sexually dimorphic leg modifications. The species has been documented in the eastern United States with historical records from Georgia and Texas, though it remains poorly known with larvae undescribed.
Toxomerus
Calligrapher Flies
Toxomerus is a large genus of hoverflies (family Syrphidae) distributed across the Americas, with over 130 described Neotropical species and additional Nearctic endemics. Species are small (typically 6–9 mm), characterized by large eyes with posterior indentation and diagnostic abdominal patterns. Most larvae are predatory on soft-bodied insects, particularly aphids, though at least three species are known pollen-feeders. Adults are pollinivorous, feeding on nectar and pollen from diverse flowering plants. The genus includes notable ecological specialists such as Toxomerus basalis, a kleptoparasite of sundews (Drosera), and several species introduced to the Afrotropics.
hoverflyflower-flyaphid-predatorpollinatorbiological-controlHymenoptera-mimickleptoparasiteintroduced-speciesNeotropicalNearcticAfrotropical-introductionpolyvoltineSyrphiniSyrphinaeDipteraSyrphidaeToxomerus-marginatusToxomerus-disparToxomerus-pulchellusToxomerus-basalisToxomerus-floralisToxomerus-politusToxomerus-apegiensisDroserasundewpollenivorypredatory-larvaeurban-adapteragricultural-beneficialcryptic-larvaeeye-dimorphismterritorial-behaviorDNA-barcodingcitizen-sciencemuseum-collectionsrange-expansionconservation-concernToxomerus dispar
Dark-sided Calligrapher
Toxomerus dispar is a species of hoverfly in the family Syrphidae, commonly known as the Dark-sided Calligrapher. The species was described by Fabricius in 1794. It belongs to the diverse genus Toxomerus, which includes numerous small to medium-sized hoverflies often recognized by their distinctive abdominal patterning. As a member of Syrphidae, this species is likely involved in pollination and may exhibit larval predation on small arthropods, though specific biological details for this species remain poorly documented in available sources.
Toxomerus floralis
Florida Calligrapher
Toxomerus floralis is a New World hoverfly (family Syrphidae) native to the Americas, ranging from the southern United States through South America. The species has been introduced to tropical Africa, where it is now established and widespread in West and Central Africa including Togo, Benin, Nigeria, and Cameroon. It represents only the second known established introduction of a non-African hoverfly species in the Afrotropics.
Toxomerus marginatus
Margined Calligrapher, Margined Calligrapher Fly
Toxomerus marginatus is a common North American hoverfly (Syrphidae) measuring 5–6 mm. Adults are frequent flower visitors, while larvae are predatory on thrips, aphids, and small caterpillars. The species has been documented as the most numerous syrphid controlling aphids in California Central Coast lettuce fields. It exhibits strong attraction to methyl salicylate, a floral compound and herbivore-induced plant volatile.
Toxomerus politus
maize calligrapher
Toxomerus politus, commonly known as the maize calligrapher, is a small hoverfly (Diptera: Syrphidae) measuring 8–9 mm. The species is native to North America but has been introduced and is expanding its distribution across Central and South America, with recent records from Chile. Adults and larvae are associated with corn (Zea mays), feeding on pollen. The species has been studied for its male genitalia morphology and sperm ultrastructure using advanced microscopy techniques.
Trichopsomyia
Trichopsomyia is a genus of hoverflies (family Syrphidae) established by Williston in 1888. The genus contains approximately 30 described species distributed across multiple continents. Adults are typical hoverflies with large compound eyes and a single pair of wings. Larvae are flattened, legless, and aphid predators. The genus belongs to the tribe Pipizini within subfamily Eristalinae.
Trichopsomyia banksi
White-faced Psyllid-killer
Trichopsomyia banksi is an uncommon species of hoverfly (family Syrphidae) found across North America. Adults are known as flower flies and visit flowers for nectar and pollen. The species has earned the common name "white-faced psyllid killer" though the specific larval biology of this species remains undocumented. Other members of the genus Trichopsomyia are known predators of psyllids, aphids, and Phylloxera.
Tropidia mamillata
Shiny Thickleg
Tropidia mamillata is a species of hoverfly (family Syrphidae) described by Loew in 1861. It belongs to the tribe Milesiini within the subfamily Eristalinae. The species is known from the United States and has been documented through limited observations.
Tropidia quadrata
Common Thick-leg Fly, Common Thickleg Fly
Tropidia quadrata is a species of hoverfly (Syrphidae) found across north-central North America. Adults are commonly observed on flowers, where they feed on nectar and pollen. The larvae are aquatic, a distinctive trait within the family. The species is notable for its thickened hind legs, which give rise to its common name.
Tropidiina
Tropidiina is a subtribe of hoverflies (family Syrphidae) containing 11 genera. Recent phylogenetic studies indicate it is sister to the tribe Eristalini, revealing that Milesiini as currently defined is polyphyletic. Members are characterized by a thickened hind femur and a body that narrows progressively from rear to head. The subtribe has broad geographic distribution with highest diversity in the Americas and Europe.
Victoriana
Victoriana is a genus of hoverflies (family Syrphidae) described by Miranda in 2020. The genus belongs to the tribe Syrphini within the subfamily Syrphinae. As a recently described taxon, biological and ecological information remains limited. The genus is known from observations and taxonomic records but detailed species-level accounts are not yet widely published.
Volucella
hover-flies, flower flies
Volucella is a genus of large, broad-bodied hoverflies in the family Syrphidae. These flies are notable for their Batesian mimicry of stinging Hymenoptera—particularly bumble bees and hornets—which provides protection from predators. Adults are regular flower visitors that feed on nectar, while larvae develop as inquilines in the nests of social bees and wasps, functioning as detritivores and predators of host larvae. The genus exhibits strong migratory behavior and males are often territorial.
Volucella evecta
Eastern Swiftwing
Volucella evecta, commonly known as the eastern swiftwing, is an uncommon hoverfly native to eastern North America. Once considered a subspecies of Volucella bombylans, genetic evidence has established it as a distinct species. This species exhibits Batesian mimicry, closely resembling bumble bees to avoid predation. Adults are known pollinators that visit flowering plants including Geum, Viburnum, and Rubus.
Volucella facialis
Yellow-faced Swiftwing
Volucella facialis is a species of hoverfly in the family Syrphidae, commonly known as the Yellow-faced Swiftwing. It belongs to a genus noted for Batesian mimicry of bumble bees and wasps. Like other Volucella species, it is an inquiline, laying eggs in the nests of social bees and wasps where larvae consume host brood. The species is found in North America, with records from Vermont and other parts of the United States.
Volucellini
Volucellini is a tribe of hoverflies (Syrphidae) within the subfamily Eristalinae. The tribe includes four genera: Copestylum, Graptomyza, Ornidia, and Volucella. Members are known for their robust, often bee-mimicking appearance and association with rotting plant material, particularly cacti, for larval development. The tribe has a broad distribution with notable diversity in the Neotropical and Afrotropical regions.
Xylota
Leafwalkers and Forest Flies
Xylota is a Holarctic genus of hoverflies (family Syrphidae) comprising over 100 described species, with 12 species occurring in Europe. Adults are characterized by their elongate body form and association with woodland habitats. Unlike most syrphid flies, many Xylota species rarely visit flowers, instead feeding on pollen gathered from leaf surfaces. Larvae are saprophytic, developing in rotting wood of both broadleaved and coniferous trees.
Xylota segnis
Orange-belted Leafwalker, brown-toed forest fly, lazy wood fly
Xylota segnis is a common Palearctic and Nearctic hoverfly distinguished by its black abdomen with a prominent orange or yellowish-red patch on tergites 2 and 3. Adults are notable for their sedentary behavior, often resting motionless on leaves rather than actively flying. The species is polyvoltine with up to three generations annually and has been observed from April through September. Larvae develop in decaying tree sap and have also been recorded from decaying human remains.