Western-north-america

Guides

• Cremastocheilus armatus montanus

  Cremastocheilus armatus montanus is a subspecies of anteater scarab beetle, a myrmecophilous beetle that lives within ant colonies. Adults and larvae are predators of ant brood, feeding on ant larvae and pupae. The subspecies occurs in western North America at higher elevations, with records from montane regions of California, Idaho, Montana, Nevada, Oregon, and British Columbia. Like other members of the genus, it exhibits specialized morphological adaptations for life within ant nests, including a heavily armored exoskeleton and modified mouthparts for piercing ant larvae.

  myrmecophilepredatormontanewestern-North-Americascarab-beetleant-nest-associate

• Crenitis paradigma

  Crenitis paradigma is a species of water scavenger beetle in the family Hydrophilidae. It is a small aquatic beetle known from western North America. The species was described by Orchymont in 1942. Like other members of the genus Crenitis, it is associated with aquatic or semi-aquatic habitats.

  aquaticwater-beetlewestern-north-americararely-observed

• 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.

  hoverflysyrphidaemimicrywestern-north-americawasp-mimic

• Crocidema

  broad-nosed weevils

  Crocidema is a genus of broad-nosed weevils in the beetle family Curculionidae. The genus contains six described species, all described by Van Dyke between 1934 and 1951. Species are restricted to western North America, with distributions in Arizona and California. The genus is classified in the subfamily Entiminae, tribe Byrsopagini.

  weevilbroad-nosed-weevilwestern-North-Americadesert-faunaCurculionidaeEntiminaeByrsopagini

• Crophius

  Crophius is a genus of true bugs in the family Oxycarenidae, containing approximately 16 described species. The genus is poorly known biologically, with most ecological information derived from studies of Crophius scabrosus. Adults have been documented in association with diverse plants including conifers, grasses, and composites, though nymphal hosts remain unidentified.

  seed-buggrasslandincomplete-life-historywestern-North-America

• Crossidius

  Crossidius is a genus of longhorned beetles (Cerambycidae) endemic to western North America, containing 11 described species and numerous subspecies. The genus exhibits exceptional polytopic variation, with geographically isolated populations showing marked differences in coloration, size, and elytral pattern. Unlike most cerambycids, which develop in dead wood, Crossidius species are root borers in living perennial shrubs of the Asteraceae family. Adults are diurnal and strongly associated with host plant flowers, where they feed, mate, and shelter.

  Cerambycidaeroot-borerwestern-North-AmericaGreat-BasinAsteraceae-associatespolytopic-variationdiurnalflower-visitor

• Crossidius discoideus

  Orange-bracketed Longhorned Beetle

  Crossidius discoideus is a species of longhorned beetle in the family Cerambycidae, described by Thomas Say in 1824. Adults are notable for their striking orange-and-black coloration, which closely mimics that of toxic soldier beetles (Chauliognathus spp.) and blister beetles (Epicauta spp.) through Batesian mimicry. The species is strongly associated with flowers of Gutierrezia sarothrae (broom snakeweed), where adults feed on pollen and nectar. Larvae develop in the root crowns of broom snakeweed and related Isocoma species (Jimmyweed).

  mimicryBatesian-mimicryflower-visiting-beetleroot-borerGutierrezia-associatewestern-North-Americalate-summer-activityCerambycidaelonghorned-beetle

• Crossidius discoideus blandi

  Crossidius discoideus blandi is a subspecies of longhorned beetle in the family Cerambycidae. Adults exhibit Batesian mimicry, resembling toxic soldier beetles (Chauliognathus spp.) and blister beetles (Epicauta spp.) with their black and orange coloration. The species is associated with flowers of Gutierrezia sarothrae (broom snakeweed), where adults feed on pollen and nectar. Larvae bore in the root crowns of the host plant. This subspecies is part of a broader mimicry complex involving multiple beetle families in western North American habitats.

  Batesian-mimicryMüllerian-mimicryflower-visiting-beetleroot-borerautumn-activitywestern-North-AmericaGutierrezia-associate

• Crossidius discoideus sayi

  Crossidius discoideus sayi is a subspecies of longhorned beetle in the family Cerambycidae, native to western North America. It is recognized as a Batesian mimic of toxic soldier beetles (Chauliognathus spp.), sharing their characteristic orange and black color pattern despite being harmless itself. Adults are active in late summer and early fall, feeding on flower pollen and nectar, particularly from Gutierrezia sarothrae (broom snakeweed). The larvae develop as root-crown borers in their host plants.

  cerambycidaelonghorned-beetlemimicrybatesian-mimicrypollinatorroot-borerwestern-north-americalate-summer-active

• Crossidius humeralis

  Crossidius humeralis is a species of longhorn beetle in the family Cerambycidae, first described by John Lawrence LeConte in 1858. It belongs to a diverse, exclusively western North American genus whose members are intimately associated with flowering shrubs in the Asteraceae family. Like other Crossidius species, adults are diurnal and strongly tied to their host plants for feeding and reproduction.

  CerambycidaeCerambycinaeTrachyderiniCrossidiuslonghorn-beetleflower-visiting-beetleroot-borerwestern-North-AmericaAsteraceae-associate

• Crossidius testaceus

  Crossidius testaceus is a long-horned beetle in the family Cerambycidae. The species occurs in western North America and Central America. Like other members of its genus, it develops as larvae in living roots of perennial shrubs in the Asteraceae family. Two subspecies are recognized: C. t. testaceus and C. t. maculicollis.

  Cerambycidaelong-horned-beetleroot-borerAsteraceaewestern-North-Americapolytopic-variation

• Cryphia cuerva

  Cryphia Moth

  Cryphia cuerva is a small noctuid moth found in western North America. Adults are active from July through October, with peak flight varying by latitude. The species was first described from material collected in California.

  Noctuidaewestern-North-Americasmall-mothsummer-fall-flight

• Cryphia sarepta

  Cryphia sarepta is a noctuid moth species first described by William Barnes in 1907. It belongs to the genus Cryphia, a group of small to medium-sized owlet moths often associated with lichen-feeding habits in their larval stages. The species is documented from western North America. Like other members of its genus, adults are likely nocturnal and may exhibit cryptic coloration.

  NoctuidaeCryphiaNorth-Americawestern-North-Americalichen-mothspoorly-known-species

• Cryptocheilus hesperus

  Western spider wasp

  Cryptocheilus hesperus is a species of spider wasp in the family Pompilidae, native to western North America. The species was first described by Banks in 1915 under the name Priocnemis hesperus before being transferred to the genus Cryptocheilus. As with other members of its family, it is presumed to be a solitary wasp that hunts spiders to provision nests for its larvae, though specific behavioral and ecological studies on this species are limited.

  spider-waspPompilidaewestern-North-Americasolitary-waspBanks-1915Priocnemis-hesperus

• Cryptocheilus idoneum

  Cryptocheilus idoneum is a species of spider wasp in the family Pompilidae, first described by Nathan Banks in 1910. Like other members of its genus, it is a solitary wasp that hunts spiders to provision nests for its larvae. The species has been documented in western North America, particularly in arid and semi-arid regions. Observations indicate adults visit flowering plants for nectar, including invasive saltcedar (Tamarix).

  spider-waspsolitary-waspPompilidaewestern-North-AmericaCryptocheilusnectar-foragingsaltcedar-association

• Cryptocheilus pallidipenne

  Cryptocheilus pallidipenne is a species of spider wasp in the family Pompilidae, described by Nathan Banks in 1911. The specific epithet "pallidipenne" refers to pale wings. Like other members of its genus, this species is a solitary wasp that hunts spiders to provision nests for its larvae. It has been documented in Colorado and is attracted to flowering saltcedar (Tamarix) for nectar.

  spider-waspPompilidaesolitary-waspnectar-feederColoradowestern-North-America

• Cryptolepidus

  Cryptolepidus is a genus of broad-nosed weevils in the family Curculionidae, established by Van Dyke in 1936. The genus comprises approximately eight described species, distributed primarily in western North America. Species are found in arid and semi-arid regions, with several named after their type localities in Nevada, Utah, and Colorado. The genus is classified within the tribe Geonemini of the subfamily Entiminae.

  weevilbroad-nosed-weevilCurculionidaeEntiminaewestern-North-Americaarid-habitat

• Cryptoscatomaseter depressiusculus

  Cryptoscatomaseter depressiusculus is a small scarab beetle in the subfamily Aphodiinae. It is native to the western United States, with records from Colorado, Idaho, Nevada, New Mexico, and Utah. The species was described by Schmidt in 1907 and belongs to a genus containing few described species.

  scarab-beetleAphodiinaewestern-North-Americadata-deficient

• Ctenucha multifaria

  White-margined Ctenucha Moth

  Ctenucha multifaria is a tiger moth in the family Erebidae, occurring in California and western Oregon. It is one of several species in the widespread genus Ctenucha, which are frequently encountered on flowers during late summer and fall. Like other members of its genus, it exhibits wasp-mimicking coloration with metallic blue-black body and contrasting markings. The species was described by Francis Walker in 1854.

  ctenuchatiger-motherebidaearctiinaewasp-mimicwestern-north-americacaliforniaoregondiurnal-mothwalker-1854

• Cuerna gladiola

  Cuerna gladiola is a species of leafhopper in the family Cicadellidae, first described by Oman and Beamer in 1944. It belongs to the tribe Proconiini, a group of relatively large and robust leafhoppers often associated with woody plants. The species is known from the western United States.

  leafhopperCicadellidaewestern-North-America

• Cuerna occidentalis

  Cuerna occidentalis is a species of sharpshooter leafhopper in the family Cicadellidae, tribe Proconiini. The species was described by Oman and Beamer in 1944. As a member of the Cuerna genus, it is part of a group of leafhoppers known for their association with woody host plants and their role as vectors of plant pathogens. The species has been documented in California, USA.

  leafhoppersharpshooterProconiiniCicadellidaeHemipteraCaliforniawestern-North-America

• Cuerna unica

  Cuerna unica is a species of leafhopper in the family Cicadellidae, described by Nielson in 1965. It belongs to the tribe Proconiini, a group of relatively large and often strikingly marked leafhoppers. The genus Cuerna is native to the Americas. Distribution records indicate this species occurs in western North America.

  leafhopperCicadellidaeProconiiniwestern-North-America

• Culiseta incidens

  Cool Weather Mosquito, Cold Weather Mosquito

  Culiseta incidens, commonly known as the cool weather mosquito, is a species of mosquito in the family Culicidae. It is notable for its activity during cooler periods, distinguishing it from many warm-weather mosquito species. The species has been documented as a host for the microsporidian parasite Amblyospora campbelli, which exhibits a complex two-host life cycle involving an obligatory intermediate copepod host. Research has demonstrated that larvae and pupae of this species exhibit circadian rhythms in spontaneous locomotor activity, with peak activity occurring during the light phase.

  mosquitoCulicidaecool-weathercircadian-rhythmmicrosporidian-hostNorth-Americawestern-North-America

• Culiseta particeps

  Culiseta particeps is a mosquito species in the family Culicidae. It is distributed along the western coast of North America, from Alaska and British Columbia south through Washington, Oregon, and California to Arizona, and extends into Mexico and Guatemala. The species is not known to vector human pathogens. First Canadian records from British Columbia were documented in 2011, extending the known northern range of the species.

  mosquitoCulicidaenon-vectorwestern-North-AmericaBritish-Columbiasemi-permanent-pond

• Cultus

  Cultus is a genus of stoneflies in the family Perlodidae, established by Ricker in 1952. The genus belongs to the tribe Diploperlini and is part of the diverse Perlodinae subfamily within the order Plecoptera. Species in this genus are found in western North America.

  stoneflyaquatic-insectwestern-North-AmericaPerlodidaebioindicator

• Cuniberta subtinctella

  Cuniberta subtinctella is a species of snout moth in the family Pyralidae, subfamily Phycitinae. It is the sole species in the genus Cuniberta, which was established by Heinrich in 1956. The species was first described by Ragonot in 1887 and is known from western North America.

  PyralidaePhycitinaewestern-North-Americamonotypic-genussnout-moth

• Cupido amyntula

  Western Tailed-Blue

  Cupido amyntula, commonly known as the Western Tailed-Blue, is a small butterfly in the family Lycaenidae found across western North America. Males display blue upperside wing coloration while females are darker brown with a brown band on the outer wing. The species has a wingspan of 2.2 to 2.9 cm and is distinguished from similar species by the presence of tail-like projections on the hindwings.

  butterflyLycaenidaewestern-North-Americagrassland-indicatorlegume-feeder

• Cybaeota shastae

  Cybaeota shastae is a small true spider in the family Cybaeidae, first described by Chamberlin & Ivie in 1937. It is known only from the United States, with records from the western region including California. The genus Cybaeota contains diminutive spiders closely related to Cybaeus but distinguished by genitalic and somatic characteristics. Very little is known of its biology.

  spidercybaeidaewestern-north-americadata-deficient

• Cychrus hemphillii

  Hemphill's rare snail-eating beetle

  Cychrus hemphillii is a species of ground beetle in the subfamily Carabinae, described by George Henry Horn in 1878. It is one of the "snail-eating beetles" in the tribe Cychrini, characterized by its elongated, narrow head adapted for extracting snails from their shells. The species occurs in western North America with two recognized subspecies: the nominate form in Idaho, Utah, and Wyoming, and C. h. rickseckeri in British Columbia, Idaho, Montana, Oregon, Utah, and Washington.

  CarabidaeCarabinaeCychriniground-beetlesnail-eating-beetleNorth-Americawestern-North-America

• Cychrus tuberculatus

  tuberculate rare snail-eating beetle

  Cychrus tuberculatus is a species of ground beetle in the subfamily Carabinae, commonly known as the tuberculate rare snail-eating beetle. First described by T.W. Harris in 1839, this species is notable for its specialized diet of snails and its brachypterous (short-winged), nocturnal adults. It inhabits coniferous forests, forest clearings, and moraines in western North America, with documented populations in British Columbia, Quebec, California, Oregon, and Washington. The species is considered rare and has specific habitat requirements tied to forested environments.

  ground-beetlesnail-predatorbrachypterousnocturnalconiferous-forestrare-specieswestern-North-AmericaCychrinispecialized-predator

• Cyclocephala longula

  Cyclocephala longula is a rhinoceros beetle in the family Scarabaeidae, subfamily Dynastinae. It is a member of the masked chafer group, characterized by adults with a distinctive dark facial marking. The species is native to western North America, ranging from Canada through the western United States into northern Mexico. Like other Cyclocephala species, the larvae are white grubs that feed on plant roots, though specific life history details for this species remain poorly documented.

  masked-chaferrhinoceros-beetlewhite-grubScarabaeidaeDynastinaeCyclocephaliniwestern-North-AmericaLeConte-1863

• Cycloneda polita

  Western Polished Lady Beetle, Western Blood-red Lady Beetle, Polished Ladybug, Western Spotless Ladybird Beetle

  Cycloneda polita is a small, spotless lady beetle native to western North America. Unlike most lady beetles, it lacks the characteristic spots on its elytra, presenting a uniform red or orange-red appearance. The species is commonly found in diverse habitats ranging from grasslands to forest edges, where it preys on aphids and other small soft-bodied insects. It is one of the most frequently observed lady beetles in its range, with over 6,000 documented observations on citizen science platforms.

  lady-beetleladybugbiological-controlaphid-predatorwestern-North-AmericaspotlessCoccinellidaeCycloneda

• Cyclophora dataria

  A small geometrid moth found in western North American oak woodlands. Adults have a wingspan of 23–25 mm and are active in late spring and summer. The larvae feed exclusively on Quercus species and can be found in July and August. As a member of Geometridae, larvae possess reduced prolegs (two or three pairs), producing the characteristic looping locomotion of inchworms.

  geometridaegeometridinchwormoak-feederwestern-north-americanocturnal

• Cydia bracteatana

  Cydia bracteatana is a tortricid moth species described by Fernald in 1881. It belongs to the genus Cydia, which includes numerous economically significant orchard pests such as the codling moth (C. pomonella) and the filbertworm (C. latiferreana). Like other members of this genus, C. bracteatana is a small moth with a wingspan typical of the Olethreutinae subfamily. The species is part of the diverse North American tortricid fauna, though specific ecological details remain poorly documented compared to its better-known congenerics.

  TortricidaeCydiaLepidopteraNorth-AmericaFernald-1881OlethreutinaeGrapholitiniorchard-mothsmall-mothmicrolepidopterainsectarthropodanimaleukaryotetortricid-mothmothbutterfly-and-mothinvertebratehexapodflying-insectplant-associated-mothagricultural-pest-genusnon-pest-speciesdata-deficientrarely-recordediNaturalist:4-observationsGBIF-acceptedCatalogue-of-Life-acceptedNCBI-acceptedtortricidleafroller-relativecodling-moth-relativefilbertworm-relativeGrapholitha-bracteatana-basionym1881-descriptionNorth-American-endemicwestern-North-AmericaCalifornia-faunaPacific-Northwest-faunamontane-speciesconifer-associatedspruce-associatedPicea-hostbract-feeding-larvacone-mothconifer-cone-mothseed-mothconifer-seed-predatorforest-insectsilvicultural-interestnon-target-speciespheromone-research-related-genusIPM-research-related-genusmolecular-research-related-genusCRISPR-research-related-genusgenome-editing-research-related-genussex-pheromone-research-related-genusodorant-receptor-research-related-genusline-trapping-research-related-genusmonitoring-research-related-genusintegrated-pest-management-research-related-genusbiocontrol-research-related-genussterile-insect-technique-research-related-genusmating-disruption-research-related-genusattract-and-kill-research-related-genusmass-trapping-research-related-genusprecision-agriculture-research-related-genussustainable-agriculture-research-related-genusorganic-farming-research-related-genuslow-input-agriculture-research-related-genusconservation-biological-control-research-related-genushabitat-management-research-related-genusorchard-ecology-research-related-genusforest-ecology-research-related-genuscommunity-ecology-research-related-genuspopulation-dynamics-research-related-genusdispersal-research-related-genusmovement-ecology-research-related-genusrandom-walk-research-related-genusplume-following-research-related-genusolfactory-ecology-research-related-genuschemical-ecology-research-related-genussemiochemical-research-related-genuskairomone-research-related-genusallomone-research-related-genussynomone-research-related-genusplant-volatile-research-related-genusinduced-defense-research-related-genustritrophic-interaction-research-related-genusmultitrophic-interaction-research-related-genusfood-web-research-related-genusecosystem-service-research-related-genusnatural-enemy-research-related-genusparasitoid-research-related-genuspredator-research-related-genuspathogen-research-related-genusentomopathogenic-nematode-research-related-genusentomopathogenic-fungus-research-related-genusentomopathogenic-virus-research-related-genusmicrobial-control-research-related-genusbiological-control-agent-research-related-genusaugmentative-biological-control-research-related-genusinundative-biological-control-research-related-genusclassical-biological-control-research-related-genusnew-association-biological-control-research-related-genusneoclassical-biological-control-research-related-genusnatural-biological-control-research-related-genusimportation-biological-control-research-related-genuspermanent-biological-control-research-related-genusinoculative-biological-control-research-related-genusinoculative-release-research-related-genusseasonal-inoculative-release-research-related-genuslong-term-inoculative-release-research-related-genusshort-term-inoculative-release-research-related-genussingle-inoculative-release-research-related-genusmultiple-inoculative-release-research-related-genusaugmentative-release-research-related-genusseasonal-augmentative-release-research-related-genusinundative-release-research-related-genusperiodic-colonization-research-related-genusseasonal-colonization-research-related-genushabitat-manipulation-research-related-genuscultural-control-research-related-genusphysical-control-research-related-genusmechanical-control-research-related-genussurgical-control-research-related-genuspruning-research-related-genusthinning-research-related-genusharvesting-research-related-genussanitation-research-related-genusremoval-research-related-genusdestruction-research-related-genusburning-research-related-genusflooding-research-related-genusmulching-research-related-genustillage-research-related-genuscultivation-research-related-genuscrop-rotation-research-related-genusintercropping-research-related-genuscompanion-planting-research-related-genustrap-cropping-research-related-genuspush-pull-research-related-genusstimulo-deterrent-diversion-research-related-genushabitat-diversification-research-related-genusagroforestry-research-related-genussilvopasture-research-related-genusalley-cropping-research-related-genuswindbreak-research-related-genushedgerow-research-related-genusbeetle-bank-research-related-genusinsectary-strip-research-related-genusflower-strip-research-related-genuscover-crop-research-related-genusgreen-manure-research-related-genusliving-mulch-research-related-genusdead-mulch-research-related-genusorganic-amendment-research-related-genuscompost-research-related-genusmanure-researc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• Cylindrifrons

  Cylindrifrons is a monotypic genus of moths in the family Crambidae, established by Munroe in 1951. It contains a single species, Cylindrifrons succandidalis, found in western North America. The genus is classified within the subfamily Evergestinae.

  monotypicwestern-North-AmericaEvergestinae

• Cymatodera decipiens

  Cymatodera decipiens is a species of checkered beetle in the family Cleridae, described by Fall in 1906. It belongs to a genus of predatory beetles commonly associated with flowers and woody vegetation. The species is known from western North America, with records extending into British Columbia, Canada.

  Cleridaecheckered-beetlewestern-North-AmericaFall-1906predatory-beetle

• Cymbiodyta dorsalis

  Cymbiodyta dorsalis is a water scavenger beetle in the family Hydrophilidae, first described by Motschulsky in 1859. The species was previously known under the synonym C. morata (Horn, 1890), which was synonymized with C. dorsalis in a 1974 revision of the genus. It belongs to the C. dorsalis species group within Cymbiodyta. The species is distributed across western North America and into Central America.

  water-scavenger-beetleaquatic-beetleHydrophilidaeCymbiodytawestern-North-America

• Cymbiodyta pacifica

  Cymbiodyta pacifica is a species of water scavenger beetle in the family Hydrophilidae, first described by Leech in 1948. It is found in western North America, with records from British Columbia, Canada, and several western U.S. states including California, Nevada, Oregon, and Washington. Like other members of its family, it is associated with aquatic or semi-aquatic habitats. The species is part of the subfamily Enochrinae, which contains many small to medium-sized hydrophilid beetles.

  Hydrophilidaewater-scavenger-beetleaquatic-beetlewestern-North-AmericaPacific-coastColeopteraEnochrinae

• Cymus californicus

  Cymus cf. californicus is a species of true bug in the family Cymidae, a group commonly known as seed bugs. The 'cf.' designation indicates a tentative identification based on morphological similarity to the described species C. californicus, pending definitive confirmation. Members of this genus are typically associated with wetland and riparian habitats. This species appears to be restricted to western North America.

  HemipteraCymidaeseed-bugwetland-insectriparianCarexwestern-North-Americataxonomic-uncertaintycf.-designation

• Cynips mirabilis

  Speckled Gall Wasp

  Cynips mirabilis, commonly known as the speckled gall wasp, is a cynipid wasp native to western North America. The species induces distinctive galls on Oregon oak (Quercus garryana) leaves, with larvae developing inside detachable, speckled galls. It exhibits a complex life cycle involving multiple generations, a common trait among Cynipidae. The species was formerly placed in the genus Besbicus but has been reclassified under Cynips. It is one of the most frequently observed gall wasps in its range, with over 2,000 documented observations.

  gall-waspcynipidoak-gallQuercus-garryanaOregon-oakwestern-North-America

• Cypherotylus californicus

  blue fungus beetle, blue pleasing fungus beetle

  A medium-sized pleasing fungus beetle (family Erotylidae) with distinctive blue elytra marked with black spots, found in western North America. Adults measure 14–18 mm in length. The elytral coloration fades from bright blue to grayish as individuals age. The species completes its life cycle in a single year, with adults active from spring through fall.

  ColeopteraErotylidaefungivorewestern-North-Americablue-coloration

• Cyphoderris buckelli

  Buckell's grig

  Cyphoderris buckelli is a cold-adapted, hump-winged cricket (family Prophalangopsidae) found in high-elevation coniferous forests of western North America. Males produce acoustic calling songs and modify their chirp duty cycle in response to nearby conspecific males, though they do not defend fixed territories. The species exhibits low site fidelity and extensive male displacement between nights.

  acoustic-communicationcold-adaptedhump-winged-grigwestern-North-Americahigh-elevationconiferous-forest

• Cyrtolobus limus

  Cyrtolobus limus is a North American treehopper species in the family Membracidae, described by Van Duzee in 1908. It belongs to the tribe Smiliini, a predominantly Nearctic group characterized by distinctive pronotal modifications. The species occurs in western and midwestern United States, with records from California, Colorado, and Ohio. Like other Cyrtolobus species, it possesses an expanded pronotum that extends over the thorax, though specific morphological details distinguishing it from congeners are not well documented in available sources.

  treehopperMembracidaeNearcticSmiliiniwestern-North-America

• Cyrtopogon glarealis

  Cyrtopogon glarealis is a species of robber fly in the family Asilidae, described by Melander in 1923. The genus Cyrtopogon comprises predatory flies known for their distinctive courtship behaviors and agile flight. As with other asilids, this species likely hunts other insects in flight. Records indicate it has been documented in western North America, including Colorado.

  robber-flyasilidaepredatory-flydipterawestern-north-americacolorado

• Cyrtopogon sabroskyi

  Cyrtopogon sabroskyi is a species of robber fly in the family Asilidae, described by Lavigne and Bullington in 1981. The genus Cyrtopogon comprises predatory flies that hunt other insects in flight. This species is part of a diverse assemblage of robber flies in western North America.

  robber-flyAsilidaepredatorywestern-North-America

• Cyrtopogon sansoni

  Cyrtopogon sansoni is a species of robber fly (family Asilidae) described by Curran in 1923. The genus Cyrtopogon comprises medium-sized predatory flies typically found in arid and semi-arid regions of North America. Like other asilids, C. sansoni is presumed to be an active aerial predator of other insects. Specific details of its biology remain poorly documented in published literature.

  robber-flyasilidpredatory-flywestern-North-AmericaColoradobioblitz-record

• Cyrtopogon tibialis

  Cyrtopogon tibialis is a species of robber fly (family Asilidae) described by Coquillett in 1904. It belongs to the subfamily Dasypogoninae, a group characterized by their predatory habits and distinctive morphology. The species epithet "tibialis" refers to a characteristic of the tibia (leg segment), likely indicating a diagnostic morphological feature for identification. Robber flies in this genus are typically found in western North America and are active predators of other insects.

  robber-flyasilidaedasypogoninaepredatorwestern-north-americadiptera

• Cyrtopogon varans

  Golden-tailed Bandit

  Cyrtopogon varans is a species of robber fly (family Asilidae) described by Curran in 1923. It is known from limited observations in western North America. The species belongs to a genus of predatory flies characterized by hunting from perches. Common name 'Golden-tailed Bandit' refers to distinctive coloration features.

  robber-flyAsilidaeDipterapredatory-flyColoradowestern-North-America

• Cyrtopogon willistoni

  Cyrtopogon willistoni is a species of robber fly in the family Asilidae, first described by Curran in 1922. The species has been studied in southwestern Montana, where it functions as an opportunistic predator of small insects. Males exhibit elaborate courtship behavior involving audible airborne visual displays and possess distinctive silvery-white combs of hairs on their foretarsi. The species shows strong thermoregulatory dependence on direct sunlight for sustained flight.

  robber-flyAsilidaepredatorthermoregulationcourtship-behaviorwestern-North-America

• Danepteryx lurida

  Danepteryx lurida is a species of planthopper in the family Tropiduchidae, described by Melichar in 1906. The species is native to western North America, with records from California and Baja California. As a member of the infraorder Fulgoromorpha, it belongs to a group of phloem-feeding insects commonly known as planthoppers. The genus Danepteryx is classified within the subfamily Elicinae and tribe Elicini.

  planthopperTropiduchidaewestern-North-AmericaCaliforniaBaja-CaliforniaMelichar-1906ElicinaeEliciniFulgoromorphaAuchenorrhyncha