North-america
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Arethaea coyotero
Mojave Thread-leg Katydid, Coyotero Thread-leg Katydid
Arethaea coyotero is a species of phaneropterine katydid in the family Tettigoniidae, commonly known as the Mojave thread-leg katydid or coyotero thread-leg katydid. The species was described by Hebard in 1935. It belongs to the genus Arethaea, a group characterized by their elongated, thread-like hind legs. Distribution records indicate presence in Arizona and Nevada.
Arethaea gracilipes
thin-footed thread-leg katydid
Arethaea gracilipes is a species of phaneropterine katydid in the family Tettigoniidae, commonly known as the thin-footed thread-leg katydid. The species was described by Thomas in 1870 and is found in North America. It is characterized by its slender, thread-like legs that give the species its common name. The genus Arethaea is part of the tribe Insarini, a group of katydids known for their elongated, delicate morphology.
Arethaea grallator
Stilt-walker Katydid
Arethaea grallator, commonly known as the stilt-walker katydid, is a species of phaneropterine katydid in the family Tettigoniidae. It was described by Scudder in 1877 and is found in North America, with confirmed records from Oklahoma and Texas. The species belongs to a genus characterized by elongated, slender body proportions.
Arge cyra
Arge cyra is a species of sawfly in the family Argidae, first described by Kirby in 1882. It is a member of the genus Arge, which comprises approximately 200 species of sawflies distributed primarily across the Northern Hemisphere. The species has been recorded across multiple Canadian provinces, suggesting a broad distribution in North America. Sawflies in this family are phytophagous, with larvae typically feeding externally on host plants.
Arge humeralis
Poison Ivy Sawfly
Arge humeralis, commonly known as the poison ivy sawfly, is a species of argid sawfly in the family Argidae. The species is notable for its specialized larval feeding relationship with poison ivy (Toxicodendron radicans), making it one of the few insects that can consume this plant. The species has been documented in North America, with distribution records from Canada and the United States.
Arge onerosa
Arge onerosa is a species of sawfly in the family Argidae, described by MacGillivray in 1923. The species is recorded from several Canadian provinces and territories including British Columbia, Manitoba, New Brunswick, and the Northwest Territories. As a member of Argidae, it belongs to a family of sawflies characterized by antennae with three to six flagellomeres and larvae that typically feed on the leaves of woody plants.
Arge pectoralis
Birch Sawfly
Arge pectoralis, commonly known as the birch sawfly, is a species of argid sawfly in the family Argidae. It is present in North America, with distribution records from multiple Canadian provinces including Alberta, British Columbia, Manitoba, and New Brunswick. As a member of the Argidae family, it belongs to a group of sawflies characterized by their distinctive biology and host plant associations.
Arge quidia
Willow Oak Sawfly
Arge quidia is a sawfly species in the family Argidae, described by Smith in 1989. It is commonly known as the Willow Oak Sawfly, indicating an association with willow oak (Quercus phellos) or related oak species. The species has been documented in eastern Canada, specifically Ontario and Quebec. As a member of the suborder Symphyta, adults lack the narrow waist characteristic of most other Hymenoptera. Larvae of Argidae are typically external leaf feeders on woody plants.
Arge scapularis
elm argid sawfly
Arge scapularis, commonly known as the elm argid sawfly, is a sawfly species in the family Argidae found across North America. It is a specialist herbivore that commonly infests elm trees (Ulmus spp.). The species name 'scapularis' refers to distinctive shoulder blade-like structures on the insect's thorax. As a member of the suborder Symphyta, it lacks the narrow 'wasp waist' characteristic of many other Hymenoptera.
Argenna obesa
Plump Dictynid Spider
Argenna obesa is a small spider in the family Dictynidae, described by Emerton in 1911. It is known from prairie and grassland regions of central North America. The species is characterized by a notably plump, rounded abdomen that distinguishes it from related dictynid spiders. Records indicate it occurs in the Canadian prairies and north-central United States. Very little is known of its biology or ecological role.
Argentostiria
Argentostiria is a monotypic moth genus in the family Noctuidae, established by Robert W. Poole in 1995. The genus contains a single species, Argentostiria koebelei, described by Riley in 1893. It is endemic to the Mojave Desert of the United States.
Argia apicalis
Blue-fronted Dancer
Argia apicalis, commonly known as the Blue-fronted Dancer, is a species of damselfly in the family Coenagrionidae native to North America. First described by Thomas Say in 1840, it is a common and widespread species assessed as Least Concern by the IUCN. The species exhibits notable color polymorphism, with males occurring in bright blue and gray-black phases and females in brown, turquoise, and gray-black phases. Color changes are multi-directional and not tied to age or mating status. Males use thoracic color patterns for sex recognition, with brown females eliciting the strongest sexual response. The species shows distinctive geographical variation in thoracic stripe patterns, with broad-striped forms in the southeastern United States and typical forms elsewhere.
Argia bipunctulata
seepage dancer
Argia bipunctulata, commonly known as the seepage dancer, is a species of narrow-winged damselfly in the family Coenagrionidae. It is native to North America and holds a conservation status of Least Concern (LC) according to the IUCN, with a stable population and no immediate threats to its survival. As a member of the genus Argia—the largest genus in the subfamily Argiinae—this species exhibits the characteristic "dancing" flight pattern typical of its congeners.
Argia emma
Emma's Dancer
Argia emma, commonly known as Emma's Dancer, is a species of narrow-winged damselfly in the family Coenagrionidae. It is found in North America. The species has been assessed by the IUCN as Least Concern (LC) with a stable population and no immediate threats to survival.
Argia fumipennis
Variable Dancer
Argia fumipennis, commonly known as the Variable Dancer, is a damselfly in the family Coenagrionidae native to North America. The species exhibits notable geographic variation in coloration, with eastern populations typically displaying violet thoracic coloration while western populations tend toward blue. It is a widespread and frequently observed species, with nearly 30,000 documented observations on iNaturalist.
Argia fumipennis atra
Black Dancer
Argia fumipennis atra is a subspecies of damselfly commonly known as the Black Dancer. It belongs to the family Coenagrionidae and is currently treated as a synonym of Argia fumipennis. The subspecies was described by Gloyd in 1968 and is found in North America and Middle America, with confirmed presence in Vermont, USA. As a member of the genus Argia, it shares the typical characteristics of dancer damselflies, which are known for their distinctive wing-flicking behavior.
Argia immunda
Kiowa Dancer
Argia immunda, the Kiowa dancer, is a species of narrow-winged damselfly in the family Coenagrionidae. It occurs in Central America and North America. The IUCN lists it as Least Concern with a stable population. Like other members of the genus Argia, it is commonly referred to as a 'dancer' due to its distinctive flight pattern.
Argia lugens
Sooty Dancer
Argia lugens, commonly known as the sooty dancer, is a narrow-winged damselfly in the family Coenagrionidae. The species occurs across Central America and North America. It is classified as Least Concern by the IUCN, with a stable population and no immediate threats to survival. The genus Argia is speciose and has been subject to extensive taxonomic revision by leading Odonata specialists.
Argia moesta
Powdered Dancer
Argia moesta, commonly known as the Powdered Dancer, is a damselfly species in the family Coenagrionidae native to North America. Mature males develop a distinctive pale blue pruinosity—a waxy, powdery coating—over their bodies. The species is notable for its year-round activity in parts of its range and its tendency to form oviposition aggregations, where females select egg-laying sites based on the presence and posture of conspecifics.
Argia munda
Apache Dancer
Argia munda, commonly known as the Apache Dancer, is a species of narrow-winged damselfly in the family Coenagrionidae. It was described by Calvert in 1902 and is distributed across Central America and North America. The species holds a Least Concern (LC) conservation status from the IUCN, with a stable population and no immediate threats to its survival.
Argia oenea
Fiery-eyed Dancer
Argia oenea, commonly known as the fiery-eyed dancer, is a narrow-winged damselfly in the family Coenagrionidae. It occurs in Central America and North America. The species is classified as Least Concern by the IUCN, with a stable population and no immediate threats to its survival. Like other members of the genus Argia, it is referred to as a 'dancer' due to its distinctive jerky flight pattern.
Argia rhoadsi
golden-winged dancer
Argia rhoadsi, commonly known as the golden-winged dancer, is a species of narrow-winged damselfly in the family Coenagrionidae. It was described by Calvert in 1902. The species is found in Central America and North America. Its IUCN conservation status is Least Concern (LC) with a stable population and no immediate threats to survival.
Argia tezpi
Tezpi Dancer
Argia tezpi, commonly known as the Tezpi Dancer, is a species of narrow-winged damselfly in the family Coenagrionidae. It belongs to the speciose genus Argia, which contains approximately 114 species in the Western Hemisphere. The species is currently classified as Least Concern by the IUCN, with a stable population and no immediate threats to its survival.
Argia tonto
Tonto Dancer
Argia tonto, commonly known as the Tonto Dancer, is a species of narrow-winged damselfly in the family Coenagrionidae. It is found in Central America and North America. The IUCN lists this species as Least Concern with a stable population and no immediate threats to its survival.
Argia translata
Dusky Dancer
Argia translata, commonly known as the Dusky Dancer, is a damselfly species in the family Coenagrionidae. It is native to eastern and southern North America and has also been documented in parts of Central and South America. The species is relatively well-observed, with over 11,000 records on iNaturalist, suggesting it is not uncommon in suitable habitats. As with other members of the genus Argia, it is associated with freshwater environments where it completes its aquatic larval development before emerging as a flying adult.
Argillophora furcilla
Forked Halter Moth
Argillophora furcilla is a noctuid moth species in the subfamily Acontiinae, described by Augustus Radcliffe Grote in 1873. The species is known by the common name Forked Halter Moth. It occurs in North America, though specific details about its biology and ecology remain poorly documented in available sources. The genus Argillophora is small and not well studied, with limited published information on life history traits.
Argiope aurantia
yellow garden spider, black and yellow garden spider, golden garden spider, writing spider, zigzag spider, zipper spider, black and yellow argiope, corn spider, Steeler spider, McKinley spider
Argiope aurantia is a large orb-weaving spider recognized by its bold yellow and black abdominal markings and distinctive web architecture. Females construct conspicuous circular webs up to 60 cm in diameter, featuring a dense zigzag band of silk called a stabilimentum at the center. The species exhibits pronounced sexual dimorphism: females reach 19–28 mm in body length with a mass around 752 mg, while males are substantially smaller at 5–9 mm. This spider is common in gardens, meadows, and open habitats across much of North America, where it serves as a significant predator of insects and other small arthropods.
Argoporis
Argoporis is a genus of darkling beetles in the family Tenebrionidae, established by Horn in 1870. The genus contains more than 20 described species distributed across North America. Members of this genus are part of the diverse tenebrionid fauna characteristic of arid and semi-arid regions.
Argyra nigriventris
Argyra nigriventris is a species of long-legged fly in the family Dolichopodidae, described by Van Duzee in 1925. The genus Argyra belongs to the subfamily Diaphorinae, a group characterized by metallic coloration and distinctive genitalia structures. Members of this genus are typically small to medium-sized flies associated with various habitats. The specific epithet "nigriventris" refers to the black venter (underside) of the abdomen, a diagnostic color pattern for this species.
Argyresthia aureoargentella
Argyresthia aureoargentella is a micro-moth in the family Argyresthiidae, described by Brower in 1953. Adults are whitish with metallic markings typical of the genus. The species occurs in North America, with records from Ontario, Quebec, and New Mexico. Adults are active from early June to late July, with one generation per year.
Argyresthia goedartella
bronze alder moth
Argyresthia goedartella, commonly known as the bronze alder moth, is a small moth species in the family Argyresthiidae. It is widely distributed across Europe and North America. The species is recognized by its distinctive coppery-golden Y-shaped wing marking and its association with birch and alder host plants. Adults are active from spring through autumn and have been observed feeding on nectar.
Argyresthia oreasella
Cherry Shoot Borer Moth
A small micro-moth in the family Argyresthiidae, commonly known as the Cherry Shoot Borer Moth. Adults are active from late June through mid-August. The species has been recorded across North America from New York to California and from Quebec to Alberta and Saskatchewan.
Argyrocoris
Argyrocoris is a genus of plant bugs in the family Miridae, established by Van Duzee in 1912. The genus belongs to the large and diverse mirid fauna of North America. Based on iNaturalist records, it appears to be rarely encountered, with few documented observations. The genus name derives from Greek roots suggesting 'silver' (argyros) and 'bug' (coris), likely referring to coloration in described species.
Argyrodes pluto
Argyrodes pluto is a species of cobweb spider in the family Theridiidae. It is found in the United States, Mexico, and Jamaica. Like other members of the genus Argyrodes, it is likely a kleptoparasite that lives on the webs of larger orb-weaving spiders, though specific behavioral observations for this species are not documented.
Argyrostrotis
Argyrostrotis is a genus of moths in the family Erebidae, established by Jacob Hübner in 1821. The genus comprises six described species distributed in North America. Species within this genus are classified within the subfamily Erebinae, a diverse group of nocturnal moths commonly known as underwings or related forms.
Argyrotaenia martini
Argyrotaenia martini is a small tortricid moth described by Powell in 1960. It is known only from Arizona, where adults have been recorded in mid-summer. The species belongs to a genus containing several economically important leafroller moths, though specific information about this species' biology remains limited.
Argyrotaenia pinatubana
Pine Tube Moth
The Pine Tube Moth is a small tortricid moth native to eastern North America. Its larvae feed primarily on eastern white pine, constructing distinctive tube-like shelters by binding needles together with silk. The species produces two generations annually and is an occasional pest in pine plantations and Christmas tree farms.
Argyrotaenia quadrifasciana
Four-lined Leafroller Moth, Four-banded Leafroller, Lesser All-green Leafroller
A small tortricid moth native to North America, recognized by the four pale transverse lines on its forewings. Adults are active from May to August, with one generation per year. The species overwinters as a third-instar larva and is associated with orchards and shrubby habitats. Larvae feed on leaves of various woody plants in the rose family.
Arhaphe breviata
Arhaphe breviata is a true bug species in the family Largidae, described by Barber in 1924. It is one of four recognized Arhaphe species occurring in the United States, distinguished from congeners by morphological characteristics detailed in taxonomic keys. The species belongs to the subfamily Larginae and tribe Araphini.
Arhaphe mimetica
Arhaphe mimetica is a largid bug (Hemiptera: Heteroptera: Largidae) occurring in the United States. Originally described as Japetus mimeticus in 1911, the species was later transferred to Pararhaphe before being restored to Arhaphe. A lectotype was designated in a 2011 taxonomic revision. It is one of four recognized Arhaphe species in the United States north of Mexico.
Arhyssus barberi
Arhyssus barberi is a species of scentless plant bug in the family Rhopalidae, described by Harris in 1942. It belongs to a genus of true bugs (Hemiptera: Heteroptera) commonly known as rhopalid bugs. Members of the genus Arhyssus are typically associated with herbaceous vegetation. The species has been recorded in western North America, including British Columbia.
Arhyssus crassus
Arhyssus crassus is a species of scentless plant bug in the family Rhopalidae, described by Harris in 1942. The genus Arhyssus belongs to the tribe Niesthreini within the subfamily Rhopalinae. Records indicate this species occurs in British Columbia and North America broadly, though specific ecological details remain poorly documented in the available literature. As with other members of Rhopalidae, this species likely feeds on plant material, but direct observations of its biology are sparse.
Arhyssus scutatus
Arhyssus scutatus is a species of scentless plant bug in the family Rhopalidae, first described by Stål in 1859. The species is distributed across North America. As a member of the Rhopalidae, it belongs to a family characterized by the absence of scent glands, distinguishing them from other coreoid bugs.
Aridia
Aridia is a genus of planthoppers in the family Dictyopharidae, first described by Ball & Hartzell in 1922. Members of this genus belong to the subfamily Orgeriinae and tribe Orgeriini, placing them among the more derived dictyopharid planthoppers. The genus is part of the diverse Fulgoroidea superfamily, which contains many economically significant plant-feeding insects. Specific species-level information remains poorly documented in accessible literature.
Arigomphus
Pond Clubtails
Arigomphus is a genus of dragonflies in the family Gomphidae, commonly known as the pond clubtails. The genus contains seven recognized species, all endemic to North America. Males possess the club-shaped abdominal tip characteristic of gomphids, while females lack this feature. The genus is notable for its ability to complete development in artificial ponds, a trait uncommon among other gomphid genera.
Arigomphus cornutus
Horned Clubtail
Arigomphus cornutus, commonly known as the Horned Clubtail, is a dragonfly species in the family Gomphidae. It is distributed across Canada and the United States. The species belongs to a genus of clubtail dragonflies characterized by expanded terminal abdominal segments.
Arigomphus furcifer
Lilypad Clubtail
Arigomphus furcifer, commonly known as the lilypad clubtail, is a dragonfly species in the family Gomphidae. It is found in North America and holds a conservation status of Least Concern (LC) according to the IUCN, with a stable population and no immediate threats to its survival. The species is part of the genus Arigomphus, which comprises clubtail dragonflies often associated with aquatic habitats.
Arigomphus maxwelli
bayou clubtail
Arigomphus maxwelli, commonly known as the bayou clubtail, is a dragonfly species in the family Gomphidae. It belongs to the genus Arigomphus, a group commonly referred to as "pond clubtails." The species is native to North America and holds a least concern conservation status with stable populations.
Arigomphus pallidus
gray-green clubtail
Arigomphus pallidus, commonly known as the gray-green clubtail, is a dragonfly species in the family Gomphidae. It is found in North America. The species has been assessed by the IUCN as Least Concern (LC), with a stable population and no immediate threats to its survival. The genus Arigomphus is part of the clubtail dragonflies, characterized by their distinctive abdominal club-like expansions.
Arigomphus submedianus
Jade Clubtail
Arigomphus submedianus, the Jade Clubtail, is a medium-sized dragonfly in the family Gomphidae. Adults measure 51–55 mm in total length. The species is found in North America and is recognized by its greenish coloration and clubbed abdomen tip.