Univoltine
Guides
Abagrotis cupida
Cupid dart, brown climbing cutworm
Abagrotis cupida is a noctuid moth found across southern Canada and the eastern United States. Adults have a wingspan of 33–35 mm and fly in late summer, with one generation per year. Larvae feed on woody plants including willow, apple, grape, and peach. The species is known by two common names reflecting different life stages: 'Cupid dart' for the adult moth and 'brown climbing cutworm' for the larva.
Abagrotis discoidalis
Abagrotis discoidalis is a noctuid moth described by Grote in 1876, with a wingspan of approximately 31 mm. It is restricted to western North America, ranging from southern Alberta south through the Rocky Mountain states to northern Arizona and New Mexico. Adults are active from June to August in Alberta, with a single annual generation.
Abagrotis duanca
Dark Dart
Abagrotis duanca is a noctuid moth first described by Smith in 1908. It occurs in the Pacific Northwest of North America, with records from Alberta's extreme southeastern corner, Saskatchewan, and surrounding regions. Adults fly from June to July in a single annual generation. The species has been reared on big sagebrush (Artemisia tridentata).
Abagrotis nanalis
Abagrotis nanalis is a small noctuid moth described by Grote in 1881. It occurs in western North America from southern British Columbia to western North Dakota and south to northern New Mexico and California. Adults are active in late summer with a single annual generation in Alberta.
Abagrotis orbis
well-marked cutworm, Barnes' climbing cutworm
Abagrotis orbis is a noctuid moth commonly known as the well-marked cutworm or Barnes' climbing cutworm. First described by Grote in 1876, this species occurs across southwestern North America with a notable disjunct population in the southern Great Lakes dune habitats. Adults are active in late summer, and larvae are recognized as orchard pests that feed on flowers of fruit trees.
Abrostola urentis
Spectacled Nettle Moth, Variegated Brindle
Abrostola urentis is a noctuid moth with a wingspan of 30–32 mm. It is known by two common names: the spectacled nettle moth and the variegated brindle. The species has a broad distribution across North America, with adults active in summer and larvae specialized on stinging nettle.
Acanalonia conica
Green Cone-headed Planthopper
Acanalonia conica is a planthopper species native to North America that has established invasive populations across Europe since its first detection in Italy in 2003. Adults are bright green with a distinctive conical head and red eyes, while nymphs are brown with white waxy filaments. The species is univoltine, highly polyphagous, and produces abundant honeydew. In Europe, it has been observed forming denser populations than in its native range and is considered a potential agricultural pest.
Acasis viridata
Olive-and-black Carpet, Olive-and-black Carpet Moth
Acasis viridata, the olive-and-black carpet moth, is a small geometrid moth native to North America. It was described by Alpheus Spring Packard in 1873. The species has a single generation per year and is active in spring and early summer. Larvae are specialized feeders on flower heads of Viburnum cassinoides.
Acericecis ocellaris
ocellate gall midge, maple eyespot gall, maple leaf spot gall
Acericecis ocellaris is a gall midge that induces distinctive blister-like eyespot galls on maple leaves. The galls feature concentric rings of yellow and red pigments surrounding a central chamber where the larva feeds. This species is the type species of the genus Acericecis and was first described by Carl Robert Osten-Sacken in 1862. It completes a single generation per year, with adults emerging in spring to mate and oviposit on young maple foliage.
Achatodes zeae
Elder Shoot Borer Moth, Spindle Worm
Achatodes zeae, known as the elder shoot borer moth or spindle worm, is a noctuid moth whose larvae bore into the shoots of elder bushes (Sambucus nigra). The species was first described in 1841 and gained agricultural attention in 1927 following an outbreak in Wisconsin. Its life cycle spans approximately one year, with extended egg dormancy and larval development focused on elder vegetation.
Acleris semipurpurana
Oak Leafshredder Moth, Oak Leaftier, Oak Leaf Tier
Acleris semipurpurana is a tortricid moth species and the most common of several moths known as "oak leaftiers." The larvae are significant defoliators of red oak group (Lobatae) trees in eastern North America. It has one generation annually, with eggs overwintering on branches and larvae feeding in spring. Outbreaks have caused considerable tree mortality, particularly in the Appalachian region during the 1960s–1970s.
Acmaeodera parkeri
Acmaeodera parkeri is a species of metallic wood-boring beetle in the family Buprestidae, described by Cazier in 1940. The species occurs in Central America and North America, with records from the southwestern United States and Mexico. Adults have been observed visiting flowers of several plant species, including Allionia incarnata (creeping four o'clock), Talinum whitei (White's flameflower), and Evolvulus arizonicus (Arizona blue-eyes).
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suavella
Thicket Knot-horn, Blackthorn Knot-horn
Acrobasis suavella is a small pyralid moth native to Europe, with an established introduced population in southwestern Canada. Adults fly nocturnally during summer months and are readily attracted to light. The larva is a concealed feeder, constructing a silken gallery within which it feeds on host plant material over an extended autumn-to-spring period. The species has been the subject of genome sequencing as part of the Darwin Tree of Life Project.
Acrobasis vaccinii
cranberry fruitworm, Cranberry Fruitworm Moth
Acrobasis vaccinii is a small pyralid moth whose larvae are significant pests of cultivated blueberries and cranberries. Adults emerge after bloom and fruit set, with females depositing eggs on unripe berries. Larvae feed internally on berry contents, consuming up to eight fruits to complete development. The species has one generation per year and overwinters as full-grown larvae in cocoons.
Acroneuria carolinensis
Carolina Stone
Acroneuria carolinensis, commonly known as the Carolina stone, is a predatory stonefly in the family Perlidae. It has a univoltine life cycle with emergence from late May through mid-July. Nymphs undergo an ontogenetic habitat shift, moving from leaf packs in slow water as small instars to cobble substrates in riffles as they grow larger. Adults are short-lived, do not feed, and are attracted to lights. The species functions as a top invertebrate predator in stream ecosystems.
Acronicta cyanescens
Blue-gray Dagger
Acronicta cyanescens is a medium-sized noctuid moth of western North America, commonly known as the Blue-gray Dagger. First described by George Hampson in 1909, this species is distinguished by its blue-gray coloration and dagger-like markings. Adults are active during summer months, with a single generation per year. The species belongs to a genus whose caterpillars are often called 'dagger moths' due to their distinctive posterior projections.
Acronicta lanceolaria
lanceolate dagger moth, pointed dagger
Acronicta lanceolaria is a noctuid moth native to North America, ranging from Nova Scotia to British Columbia. The species was described by Augustus Radcliffe Grote in 1875. Adults fly in early June in a single generation. It is listed as a species of special concern and believed extirpated in Connecticut.
Actebia fennica
Finnish Dart, black army cutworm, Eversmann's rustic
Actebia fennica is a noctuid moth with a Holarctic distribution spanning boreal regions of North America and Eurasia. Adults are active from July to September with a single generation per year. The species exhibits a documented behavioral response to landscape fire smoke, with females doubling egg production when exposed to volatiles from burning vegetation. Larvae feed on a diverse range of host plants including grasses, forbs, and woody species in coastal and disturbed habitats.
Actias luna
Luna Moth, North American Luna Moon Moth
Actias luna, the Luna moth, is a large, lime-green saturniid moth native to North America, recognized as one of the continent's most visually striking insects. Adults possess a wingspan reaching up to 114 mm (4.5 inches), with distinctive elongated hindwing tails and prominent eyespots that may confuse predators. The species exhibits strong sexual dimorphism: males have highly feathery antennae for detecting female pheromones, while females have slender antennae and larger abdomens. Larvae feed on a variety of broadleaf trees including sweetgum, hickory, walnut, birch, and sumac. The moth is univoltine in northern portions of its range, with larvae overwintering in leaf-litter-camouflaged cocoons before emerging as adults in spring; southern populations may produce two or three broods annually.
Adelognathinae
Adelognathinae is a subfamily of ichneumonid wasps comprising ectoparasitoid species that attack sawfly larvae. Members exhibit koinobiont or idiobiont strategies, with some species displaying unusual reproductive biology including egg deposition directly from the genital opening rather than through the ovipositor. The subfamily is best documented from Britain, where detailed studies have revealed rapid larval development and complex host-feeding behaviors.
Adelphocoris lineolatus
Lucerne bug, alfalfa plant bug
Adelphocoris lineolatus is a mirid bug native to the Old World that has become a significant agricultural pest following its introduction to North America in 1917. It primarily damages alfalfa and other legume crops through feeding on reproductive and vegetative structures. The species exhibits migratory behavior that facilitates rapid population dispersal and range expansion. In northern regions, it typically follows a univoltine life cycle with overwintering eggs, while southern populations may show partial second generation development.
Aethes matheri
Aethes matheri is a small tortricid moth native to the United States. It was described in 2002 and named in honor of Bryant Mather. The species exhibits a broad latitudinal distribution with corresponding variation in its life cycle timing.
Agathymus neumoegeni
orange giant-skipper, Neumogen's giant-skipper, Neumogen's agave borer, Neumogen's moth-skipper, tawny giant-skipper
Agathymus neumoegeni, the orange giant-skipper, is a large skipper butterfly of the southwestern United States and northern Mexico. Adults are univoltine, flying in September and October, and are strongly associated with agave plants. The species is notable for its distinctive orange and black wing patterning and its unique life history involving caterpillars that bore into agave leaves. Males exhibit mud-puddling behavior while females are non-feeding.
Agnorisma badinodis
Pale-banded Dart, Spotted-sided Cutworm
Agnorisma badinodis is a noctuid moth with a wingspan of approximately 36 mm. It occurs in southern Canada and the eastern United States, with one generation annually. Larvae feed on a broad range of herbaceous plants and crops.
Agrilus bilineatus
two-lined chestnut borer, twolined chestnut borer
Agrilus bilineatus is a metallic wood-boring beetle native to eastern North America that attacks oak trees (Quercus spp.) and chestnut (Castanea spp.). Unlike most Agrilus species that develop in dead twigs and branches, it is a trunk borer of living trees and represents a significant forest pest. Adults emerge from June through September with peak activity in late June to July. The species has been introduced to Turkey, where it poses an emerging threat to European oak and chestnut species.
Agrotis obliqua
Oblique Dart
Agrotis obliqua is a noctuid moth native to North America, first described by Edgar Albert Smith in 1903. The species has a wingspan of approximately 30 mm. Adults are active in spring and early summer, with a single generation produced annually. It is found across a broad geographic range from Newfoundland to Vancouver Island, extending southward to Colorado, Arizona, and California.
Agrotis stigmosa
Spotted Dart
Agrotis stigmosa, commonly known as the Spotted Dart, is a noctuid moth species first described by Morrison in 1874. It is distributed across northern North America from New England westward through the Great Plains to eastern Alberta. The species is listed as a species of special concern in Connecticut, indicating conservation attention. Adults are active in late spring and early summer, with a single generation per year.
Agrotis vancouverensis
Vancouver Dart
Agrotis vancouverensis, commonly known as the Vancouver Dart, is a noctuid moth native to the Pacific Northwest of North America. The species was first described by Augustus Radcliffe Grote in 1873. Adults are active in late spring and early summer with a single annual generation. The forewings measure approximately 33 mm in length.
Agrotis vetusta
Old Man Dart, Spotted-legged Cutworm, Muted Dart (for subspecies A. v. mutata)
Agrotis vetusta is a medium-sized noctuid moth commonly known as the Old Man Dart or Spotted-legged Cutworm. Adults have a wingspan of 35–42 mm and are active from August to September. The species is notable for its broad North American distribution spanning from southern Alaska to Nova Scotia and southward into Mexico. Larvae are polyphagous cutworms that feed on forbs, vegetables, and row crops, occasionally causing agricultural damage. Three subspecies are recognized, with A. v. mutata restricted to western populations.
Agrotis volubilis
Voluble Dart, Voluble Dart Moth
Agrotis volubilis, the voluble dart moth, is a noctuid moth species described by Leon F. Harvey in 1874. It has a broad distribution across North America, ranging from Newfoundland to British Columbia in Canada and from Maine to Florida west to the Pacific Coast in the United States. The species is univoltine, with adults active from May to July. Larvae are generalist feeders on a variety of herbaceous plants including agricultural crops.
Allocapnia
winter stoneflies
Allocapnia is a genus of small winter stoneflies in the family Capniidae, comprising at least 40 described species. Adults emerge during winter months, typically from December through March. Nymphs inhabit stream substrates and exhibit vertical movement within the hyporheic zone, often retreating to deeper substrate during summer diapause and returning to surface layers in autumn.
Allocapnia recta
Eastern Snowfly
Allocapnia recta, commonly known as the eastern snowfly, is a small winter stonefly in the family Capniidae. The species exhibits a univoltine slow-season life cycle with adult emergence occurring during January-February. It inhabits karst headwater streams, where it has been observed at higher densities in intermittent flow sections compared to permanent flow sections. The species is found in eastern North America.
Allothrombium
Sumo Mites
Allothrombium is a genus of velvet mites (family Trombidiidae) comprising approximately 45 described species distributed across the Palaearctic, Ethiopian, Australian, Oriental, and Nearctic realms. Species in this genus exhibit complex life cycles involving parasitic larvae and predatory post-larval stages. Larvae are ectoparasites primarily of aphids, while deutonymphs and adults are free-living predators of small arthropods and their eggs. Several species have been investigated as potential biological control agents for agricultural pest aphids.
Amarochara
A genus of rove beetles (Staphylinidae: Aleocharinae: Oxypodini) established by C.G. Thomson in 1858. The genus comprises approximately 25 valid species distributed across the Holarctic region, with the majority described or redescribed in a comprehensive 2002 revision. Holarctic species are organized into five species groups based on phylogenetic analysis, replacing the previous subgeneric classification system.
Amarochara fenyesi
Fenyes's Minute Rove Beetle
A small rove beetle in the genus Amarochara, described by Blatchley in 1910. It is one of 25 valid species recognized in the Holarctic revision of the genus. The species belongs to a group characterized by specific morphological traits and shares the genus-wide trait of apparently utilizing subterranean habitats for reproduction and hibernation.
Amarochara forticornis
Amarochara forticornis is a rove beetle species in the tribe Oxypodini, originally described by Lacordaire in 1835. It is one of 25 valid species recognized in the Holarctic revision of the genus Amarochara. The species has undergone taxonomic clarification, with previous synonymies resolved. It is assigned to one of five species groups established for Holarctic representatives of the genus.
Amblyscirtes hegon
pepper-and-salt skipper
Amblyscirtes hegon, commonly known as the pepper-and-salt skipper, is a small grass-feeding skipper butterfly native to eastern and central North America. It is distinguished by its relatively early spring flight period and association with grassy habitats. The species has a single generation per year and is mostly absent from coastal plain regions within its range.
Ametropodidae
Ametropodidae is a family of mayflies in the order Ephemeroptera. The family contains at least three genera: Ametropus, Brevitibia, and Palaeometropus. Species within this family are primarily found in large river systems. The family is classified within the superfamily Baetoidea, which includes some of the most primitive living mayfly species.
Ametropus
sand minnows
Ametropus is a genus of mayflies (Ephemeroptera) commonly known as sand minnows, belonging to the family Ametropodidae. The genus contains at least three described species: A. ammophilus, A. fragilis, and A. neavei. Species in this genus are adapted to large river systems and exhibit specialized ecological traits including deep-water nymphal habitats and detritivorous feeding habits.
Amphipyra glabella
Grey Amphipyra, Smooth Amphipyra
Amphipyra glabella is a noctuid moth found across eastern and central North America. Adults are active from August to September with one generation per year. The species was first described by Herbert Knowles Morrison in 1874. It is one of several Amphipyra species known as "amphipyra" moths, characterized by their stout bodies and cryptic coloration.
Anacampsis
Anacampsis is a worldwide genus of gelechiid moths established by Curtis in 1827. Species are predominantly distributed in the Nearctic and Neotropical regions, with additional records from Europe and Asia. Larvae of most species are leafrollers or leaf folders on deciduous trees and shrubs, constructing shelters from rolled or spun leaves. Several species have been studied in detail for their larval biology and host plant associations.
Anacampsis populella
poplar sober
A small gelechiid moth native to Europe, accidentally introduced to North America. Adults are active from May to September with variable whitish forewings marked with black or dark grey. Larvae are leaf-rollers that feed on poplars and willows, constructing silk-bound leaf tubes in which they develop and pupate. The species is univoltine, with eggs overwintering.
Anacampsis wikeri
Anacampsis wikeri is a small moth in the family Gelechiidae, described from Illinois in 2013. The species is restricted to prairie habitats and is univoltine, with larvae feeding exclusively on leadplant (Amorpha canescens). Adults are active from early June through autumn and overwinter, resuming activity the following spring. The species is externally nearly identical to the related A. psoraliella, requiring genital examination or larval host plant knowledge for reliable identification.
Ancylis
Ancylis is a genus of tortricid moths (Lepidoptera: Tortricidae) commonly known as leafroller moths. Species in this genus are typically small moths with mottled or banded forewings. Many are univoltine and associated with specific host plants, with larvae that fold or roll leaves of trees and shrubs. The genus has a Holarctic distribution with some species also recorded from Asia. Several species are of economic importance as pests of fruit crops and forestry trees.
Ancylis discigerana
Yellow Birch Leaffolder Moth, Birch Leaffolder
Ancylis discigerana is a small tortricid moth specialized on yellow birch (Betula alleghaniensis). The species completes one generation annually, with larvae that fold leaves to feed within protected shelters. It is restricted to northeastern North America where its host tree occurs.
Andrena erigeniae
Spring Beauty Miner Bee, Spring Beauty Andrena
Andrena erigeniae is a solitary mining bee native to North America, commonly known as the Spring Beauty Miner Bee. The species is univoltine, with adults active in spring. Females excavate underground burrows in clay soil, constructing nests with multiple cells provisioned with pollen and nectar. The species exhibits specialized foraging behavior associated with spring-blooming plants.
Anerastia lotella
Sandhill Knot-horn, Sandhill Knot-horn moth
Anerastia lotella, commonly known as the Sandhill Knot-horn moth, is a small pyralid moth with a chromosome-level genome assembly available. Adults are active in July and are single-brooded. The species shows phenotypic variation between coastal and inland populations, with coastal individuals typically larger and paler.
Anicla exuberans
Exuberant Dart
Anicla exuberans is a noctuid moth known as the Exuberant Dart, first described by John Bernhardt Smith in 1898. It is characterized by a moderate wingspan of 37–41 mm and a univoltine life cycle with adults active during summer months. The species occupies dry interior habitats across western North America, ranging from central Mexico to the Canadian prairies.
Anicla tepperi
Black-girdled Dart
Anicla tepperi is a moth in the family Noctuidae, commonly known as the Black-girdled Dart. The species occurs in central North America, ranging from eastern Manitoba and the Alberta foothills south to southern Colorado. Adults have a wingspan of 36–40 mm and fly from June to July. The larvae feed on grasses in the family Poaceae.
Anisota peigleri
yellowstriped oakworm, yellow-striped oakworm moth
Anisota peigleri is a saturniid moth native to the southeastern United States, described by Jules C. E. Riotte in 1975. Previously misidentified as Anisota senatoria, this species is distinguished by its diurnal adult activity and specific geographic range. The larvae are specialized oak feeders that develop in gregarious clusters, causing noticeable but generally non-lethal defoliation of host trees. The species completes one generation annually, with adults active from mid-July through late August.