Western-north-america
Guides
Habrodais grunus
Golden Hairstreak
The golden hairstreak is a small North American butterfly in the family Lycaenidae. It is strongly associated with oak habitats and displays unusual crepuscular activity patterns, being most active during dawn and dusk rather than midday. The species has a single annual generation and shows high fidelity to specific oak host plants for larval development.
Habronattus americanus
Habronattus americanus is a species of jumping spider in the family Salticidae, native to western North America. Males are distinguished by black coloration with bright red pedipalps and leg markings used in courtship displays to attract females. The species is part of the diverse Habronattus genus, known for elaborate multimodal courtship involving visual, vibratory, and acoustic signals. Research indicates strong female preference for male red ornamentation, which can drive interspecific mating dynamics with related species.
Habronattus amicus
Habronattus amicus is a small jumping spider (family Salticidae) found in the western United States and parts of western Canada. It belongs to the species-rich genus Habronattus, which is particularly diverse in southwestern North America. The species has been the subject of phylogeographic research revealing complex evolutionary dynamics, including localized mitochondrial introgression with syntopic species such as H. ustulatus in dune systems of south-central Oregon. Like other members of its genus, it is a ground-dwelling, visually-oriented predator.
Habronattus calcaratus maddisoni
Maddison's Jumping Spider
Habronattus calcaratus maddisoni is a subspecies of jumping spider in the family Salticidae, described by Griswold in 1987. It belongs to the genus Habronattus, a large group of small jumping spiders known for elaborate courtship displays involving visual and acoustic signals. Males of the Habronattus calcaratus species group possess modified third legs with prominent spurs used in visual signaling to females during courtship. This subspecies occurs in western North America, with records from the United States.
Habronattus californicus
Habronattus californicus is a species of jumping spider in the family Salticidae. It is native to western North America, occurring in California and the Baja California Peninsula in Mexico. Like other members of the genus Habronattus, males likely possess elaborate courtship displays involving visual and acoustic signals. The genus is known for having some of the most complex multimodal courtship behaviors among terrestrial invertebrates.
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cineraria
Habropoda cineraria is a solitary digger bee in the family Apidae, native to western North America. Like other members of the genus Habropoda, it nests in sandy soils and exhibits specialized ecological relationships with nest parasites. The species has been documented in coastal and interior western habitats, though detailed biological studies specific to this species remain limited compared to better-known congeners such as H. miserabilis and H. pallida.
Hadenella
Hadenella is a monotypic genus of noctuid moths established by Grote in 1883. The sole species, Hadenella pergentilis, occurs in western North American sage steppe habitats from the Pacific Northwest and Alberta south through the Rocky Mountains to Utah and Colorado, and along the Pacific Coast to southern California.
Hadenella pergentilis
Hadenella pergentilis is a noctuid moth and the sole species in its genus. It occurs in western North America from the Pacific Northwest and Canadian prairies south through the Rocky Mountains to Colorado and Utah, with coastal populations in southern California. The species is associated with sage steppe habitats. It was described by Augustus Radcliffe Grote in 1883.
Hadoa
Western Annual Cicadas
Hadoa is a genus of large-bodied cicadas (family Cicadidae) native to Western North America. The genus was erected in 2015 by Moulds to accommodate species previously placed in Tibicen, which was redefined to include only European species. Hadoa species are annual cicadas, with adults typically emerging during summer months. The genus contains approximately 20 species distributed across western North American habitats including deserts, woodlands, and montane regions.
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.
Hadronema militare
Hadronema militare is a univoltine orthotyline plant bug that completes its entire nymphal development, reproduction, and oviposition before mid-summer host senescence. It is specialized on herbaceous legumes in the subfamily Faboideae, particularly lupine (Lupinus) and goldenbanner (Thermopsis). The species overwinters as eggs and has been documented across western North America from low to mid-elevations.
Hadrotettix trifasciatus
three-banded grasshopper, three-banded range grasshopper
Hadrotettix trifasciatus is a large band-winged grasshopper native to western North American grasslands. It is among the largest rangeland grasshopper species, with females reaching dry weights of approximately 469 mg. The species is notable for its distinctive wing banding pattern and preference for forbs over grasses in its diet. Despite its size, it maintains low population densities across most of its range and is not considered economically significant.
Harpalus fraternus
Harpalus fraternus is a species of ground beetle in the subfamily Harpalinae. It was described by John Lawrence LeConte in 1852. The species is native to western Canada and the United States. Like other members of the genus Harpalus, it is a ground-dwelling predator.
Hebardacris
Mount Whitney grasshopper (for H. albida)
Hebardacris is a genus of spur-throated grasshoppers in the family Acrididae, established by Rehn in 1952. The genus contains at least three described species: H. albida (Mount Whitney grasshopper), H. excelsa, and H. mono. These species are native to western North America, with records concentrated in California. The genus belongs to the tribe Podismini within the subfamily Melanoplinae.
Hebecephalus occidentalis
Hebecephalus occidentalis is a leafhopper species in the family Cicadellidae, first described by Beamer and Tuthill in 1935. It belongs to the subfamily Deltocephalinae, one of the largest and most diverse groups of leafhoppers. The species is known from western North America, with records from Alaska, Alberta, British Columbia, Colorado, and Manitoba. As with most members of its family, it is presumed to feed on plant phloem sap using piercing-sucking mouthparts.
Hebecephalus signatifrons
Hebecephalus signatifrons is a species of leafhopper in the family Cicadellidae, subfamily Deltocephalinae. First described by Van Duzee in 1892, this species is placed in the tribe Paralimnini, a group associated with wetland and riparian habitats. Records indicate a western North American distribution.
Helesius nigripennis
Helesius nigripennis is a small lady beetle (Coccinellidae) found in western North America. Adults measure approximately 2.45–3 mm in length and exhibit distinctive coloration with a red head and pronotal markings contrasting against black or dark brown elytra. The species has been recorded from Colorado and Montana.
Heliolonche modicella
Agoseris Flower Moth
Heliolonche modicella is a small moth in the family Noctuidae, commonly known as the Agoseris Flower Moth. It is notable for its diurnal activity, unusual among noctuid moths. The species has a wingspan of approximately 18 mm. It occurs in western North America, with confirmed records from California.
Heliolonche pictipennis
Red-lined Moth
Heliolonche pictipennis, commonly known as the Red-lined Moth, is a small noctuid moth species described by Grote in 1875. It is native to western North America, with documented occurrences in California and Arizona. The species has a wingspan of 16–17 mm. Larvae are known to feed on specific host plants including Malacothrix glabrata and Rafinesquia neomexicana.
Heliopetes ericetorum
Northern White-Skipper
Heliopetes ericetorum is a skipper butterfly in the family Hesperiidae, commonly known as the Northern White-Skipper. It occurs in arid regions of western North America, from eastern Washington south through the southwestern United States to Baja California, Mexico. The species produces two broods annually and adults are active from spring through fall. Larvae feed on mallow plants (Malvaceae), while adults are characterized by white wings with dark marginal markings that differ between sexes.
Hellinsia brucei
Bruce's Plume Moth
Hellinsia brucei, commonly known as Bruce's Plume Moth, is a species of plume moth in the family Pterophoridae. First described by Fernald in 1898, it is found in western North America including Arizona, Colorado, and parts of Canada. The species was formerly classified under the genus Oidaematophorus. As a plume moth, it exhibits the characteristic split or feathery wing structure typical of this family.
Hellinsia grandis
Coyote Brush Borer Plume Moth
Hellinsia grandis, commonly known as the coyote brush borer plume moth, is a plume moth in the family Pterophoridae. It is distributed across western North America from California through Mexico to Guatemala. The species is notable for its specialized larval association with Baccharis pilularis (coyote brush), where larvae bore into stems. Adults are active in August and have a wingspan of approximately 34 mm.
Helochara delta
Helochara delta is a species of leafhopper in the family Cicadellidae, first described by Oman in 1943. It belongs to the subfamily Cicadellinae, a group commonly known as sharpshooters. The species has been recorded from western North America, with observations in British Columbia, Washington, and California. Like other members of its genus, it is associated with vascular plant hosts, though specific ecological details remain poorly documented.
Helochares normatus
Helochares normatus is a species of water scavenger beetle in the family Hydrophilidae, first described by LeConte in 1861. It occurs in western North America and Central America, with records from the southwestern United States through Mexico to Costa Rica. Like other members of the genus, it is associated with aquatic or semi-aquatic habitats. The species is documented through limited but geographically dispersed observations.
Helops laetus
Helops laetus is a species of darkling beetle in the family Tenebrionidae, described by LeConte in 1857. It belongs to the genus Helops, a group of darkling beetles found in western North America. The species is known from British Columbia, Canada. Darkling beetles in this genus are typically associated with forested habitats and are characterized by their elongated body form and relatively long antennae compared to some other tenebrionid genera.
Helops pernitens
Helops pernitens is a darkling beetle in the family Tenebrionidae, first described by LeConte in 1861. The species is notable for possessing antennae that resemble those of ground beetles (Carabidae)—elongated and filament-like rather than the bead-like form typical of most tenebrionids. This morphological convergence can lead to misidentification with predatory ground beetles. The species is found in western North America, with records from British Columbia, Canada.
Hemaris thetis
Rocky Mountain Clearwing, California Clearwing
Hemaris thetis is a day-flying sphinx moth in the family Sphingidae, commonly known as the Rocky Mountain clearwing or California clearwing. The species exhibits clearwing morphology with reduced wing scaling, resembling a bumblebee in flight. Adults are active from May to August and feed on nectar from various flowers. The species was first described by Jean Baptiste Boisduval in 1855 and occurs in mountainous regions of western North America.
Hemileuca eglanterina
Sheep Moth, Common Sheep Moth
Hemileuca eglanterina, commonly known as the sheep moth or common sheep moth, is a day-flying saturniid moth native to western North America. The species exhibits remarkable geographic variation in coloration, ranging from nearly black to pink/yellow to the typical orange with black markings. Adults are short-lived and lack functional mouthparts, relying entirely on fat reserves accumulated during the larval stage. The species has been documented in coevolutionary dynamics with Argiope spiders, which appear to lure male moths using chemical mimicry of female moth sex pheromones.
Hemileuca hera
Sagebrush Sheep Moth, Hera Buckmoth
Hemileuca hera is a large, day-flying Saturniid moth (buck moth) native to western North America. First described by Thaddeus William Harris in 1841, this species exhibits striking geographic color variation ranging from nearly white to nearly black depending on locale. Adults are diurnal, lack functional feeding mouthparts, and do not feed. The species comprises two recognized subspecies: H. h. hera (Great Basin) and H. h. marcata (Southern Oregon). Larvae feed on sagebrush (Artemisia tridentata, A. tripartita) and other plants including Lupinus and Eriogonum.
Hemileuca nuttalli
Nuttall's Sheep Moth, Nuttall's Buck Moth
Hemileuca nuttalli, or Nuttall's sheep moth, is a medium-sized saturniid moth native to western North America. It is one of approximately 24 species in the genus Hemileuca, commonly known as buck moths or sheep moths. The species exhibits distinctive yellow-orange and black wing patterning and has urticating larvae that feed on woody shrubs. Adults are diurnal and do not feed. In behavioral studies, male H. nuttalli showed no attraction to Argiope aurantia spider pheromone lures, unlike some closely related species, suggesting potential predator-prey coevolutionary dynamics.
Hemipenthes edwardsii
Edwards's bee fly
Hemipenthes edwardsii is a bee fly in the family Bombyliidae, found in western North America. Its larvae are hyper-parasites, developing as parasites of ichneumon wasp and tachinid fly larvae that themselves parasitize caterpillars of butterflies and moths. The species was described by Coquillett in 1894 and is one of approximately 800 bee fly species in North America.
Henricus fuscodorsana
cone cochylid moth, Cone Cochylid
Henricus fuscodorsana, known as the cone cochylid moth, is a small tortricid moth found in western North America. The species is notable for its specialized larval ecology: larvae are cone miners that develop within the cones of coniferous trees across multiple genera. Adults are active across a broad seasonal window from spring through autumn.
Herthania concinna
Herthania concinna is a species of marsh beetle in the family Scirtidae. It occurs in North America, with confirmed records from Alberta and British Columbia, Canada. The species was originally described by LeConte in 1853 and is currently recognized as a synonym of Cyphon concinnus in some taxonomic databases. As a member of Scirtidae, it inhabits moist environments associated with marsh habitats.
Hesperia juba
Juba skipper, Yuba skipper, jagged-border skipper
Hesperia juba, commonly known as the Juba skipper, Yuba skipper, or jagged-border skipper, is a butterfly in the family Hesperiidae. It occurs in western North America from British Columbia through California and eastward to the Rocky Mountain states. The species has two generations per year, with adults active in late spring and again in late summer. Larvae develop on specific grass species, while adults feed on flower nectar.
Hesperia nevada
Nevada Skipper
Hesperia nevada, commonly known as the Nevada Skipper, is a butterfly species in the family Hesperiidae. It occurs in western North America from southern Canada through the western United States. The species belongs to a genus of skippers known for their rapid, darting flight patterns. Like other Hesperia species, adults likely have a characteristic stocky build with relatively large eyes.
Hesperoboreus
Hesperoboreus is a genus of snow scorpionflies (Mecoptera: Boreidae) established by Norman Penny in 1977. Members of this genus are small, wingless insects adapted to cold environments. The genus is distinguished from the related Boreus by morphological features of the male genitalia. Very few observations exist, with only three records documented on iNaturalist as of the knowledge cutoff.
Hesperoboreus brevicaudus
Hesperoboreus brevicaudus is a species of scorpionfly in the family Boreidae, commonly known as snow scorpionflies. The species was described by George Byers in 1961 and is one of several western North American species in the genus Hesperoboreus. Like other boreids, adults are active during cold months and are often found on snow. The specific epithet brevicaudus refers to the relatively short abdomen characteristic of this species.
Hesperolinus parcus
Hesperolinus parcus is a rove beetle (family Staphylinidae) in the tribe Xantholinini. It is distributed across western North America from the Pacific Coast to the Rocky Mountains. The species was described by John Lawrence LeConte in 1863. Like other members of its tribe, it is likely associated with decaying organic matter, though specific biological details remain poorly documented.
Hesperoperla pacifica
golden stonefly, Golden Stone
Hesperoperla pacifica, commonly known as the golden stonefly, is a species of common stonefly in the family Perlidae. It is native to western North America, with documented populations in Colorado streams and broader distribution across Alberta, Arizona, Alaska, British Columbia, and California. The species has been studied for its life history responses to varying flow regimes and serves as an indicator of stream health in its aquatic habitats.
Hesperophylax
Hesperophylax is a genus of northern caddisflies (Trichoptera: Limnephilidae) comprising seven described species distributed across western North America. The genus is characterized by morphological plasticity and broad habitat tolerance compared to other Trichoptera. Larvae construct portable protective cases and exhibit chemically-mediated antipredator behaviors. All species appear to be univoltine with extended adult flight periods.
Hesperopsis libya
Mojave sootywing, Mohave sootywing, Great Basin sootywing, Lena sooty wing
A small skipper butterfly of the family Hesperiidae, found in arid regions of western North America. Adults have a wingspan of 22–32 mm and exhibit variable flight periods depending on latitude, with multiple generations in southern California and single generations in northern parts of the range. The species is tightly associated with saltbush (Atriplex) host plants in alkaline desert environments.
Hesperumia
sulphur moth
Hesperumia is a genus of geometrid moths established by Packard in 1873. The genus contains four recognized species distributed across western North America, with adults typically active during summer months. Larval stages are poorly documented, but the genus is associated with various host plants including buckwheat and other herbaceous vegetation. Adults of at least one species, H. sulphuraria, are attracted to light sources.
Heterlimnius corpulentus
Corpulent Riffle Beetle
Heterlimnius corpulentus is a species of riffle beetle in the family Elmidae, commonly known as the Corpulent Riffle Beetle. It was described by LeConte in 1874 and is found in western North America, with records from the Canadian provinces of Alberta and British Columbia. Riffle beetles in this family are aquatic and associated with flowing water habitats.
Heteroecus pacificus
beaked spindle gall wasp
Heteroecus pacificus, commonly known as the beaked spindle gall wasp, is a species of cynipid gall wasp native to western North America. It induces distinctive galls on canyon live oak (Quercus chrysolepis) and huckleberry oak (Quercus vaccinifolia). The species exhibits a complex life cycle with two annual generations: one sexual generation producing males and females, and one parthenogenetic generation consisting solely of females.
Hexatoma sculleni
Hexatoma sculleni is a crane fly species in the family Limoniidae, described by Charles Paul Alexander in 1943. It belongs to a genus of small to medium-sized crane flies characterized by reduced wing venation and relatively short legs compared to true crane flies (Tipulidae). The species is known from a limited geographic range in the western United States. Very few observations exist, suggesting it is either genuinely rare or underreported.
Hibana incursa
ghost spider
Hibana incursa is a species of ghost spider in the family Anyphaenidae, first described by Chamberlin in 1919. It is a small, pale-colored, nocturnal hunting spider distributed from the United States through Panama. Like other ghost spiders, it does not build webs to capture prey but instead actively prowls vegetation for insects.
Hippodamia caseyi
Casey's lady beetle, Casey's ladybird
Hippodamia caseyi, commonly known as Casey's lady beetle, is a small lady beetle species in the family Coccinellidae. Adults measure 4.80–6.70 mm in length. The species is native to western North America, with confirmed records from British Columbia, California, Colorado, Idaho, Montana, Oregon, Utah, Washington, and Alberta. The pronotum sometimes displays pale spots. Like other members of the genus Hippodamia, it is likely a predator of small insects such as aphids, though specific ecological studies for this species are limited.
Hippodamia lunatomaculata
crescent lady beetle
Hippodamia lunatomaculata, commonly known as the crescent lady beetle, is a species of lady beetle in the family Coccinellidae. It is found in western North America, with records from British Columbia, Oregon, Washington, and California. Adults measure 4.15–5.60 mm in length. The species includes two recognized subspecies: H. l. lunatomaculata (restricted to California) and H. l. dobzhanskyi (found across the full range).
Hippodamia moesta
sorrowful lady beetle
Hippodamia moesta, commonly known as the sorrowful lady beetle, is a species of lady beetle in the family Coccinellidae. It is native to western North America and is characterized by its predominantly black elytra with a pale marginal spot and body length of 6–7.5 mm. The species includes three recognized subspecies with distinct geographic distributions.
Hippodamia oregonensis
Oregon Lady Beetle
Hippodamia oregonensis is a small lady beetle species in the family Coccinellidae. Adults measure approximately 4–5 mm in length. The species is native to western North America and has been documented in Alberta, British Columbia, Colorado, Oregon, Utah, and Washington. It is distinguished by a black pronotum with yellow lateral and apical borders and elytra bearing black spots.