Flightless
Guides
Calathus ruficollis ruficollis
A flightless ground beetle subspecies distributed across southern California from Santa Barbara County to northern Baja California, including several Channel Islands. The subspecies is distinguished from the southern Sierra Nevada population (C. r. ignicollis) by genetic and geographic separation. Despite being flightless, populations show limited phylogeographic structure across the species' range, suggesting recent population expansion and gene flow across potential geographic barriers.
Calosoma moniliatum
collared beautiful black searcher
Calosoma moniliatum, commonly known as the collared beautiful black searcher, is a large predatory ground beetle in the family Carabidae. Adults are brachypterous (short-winged and flightless). The species occurs in western North America, inhabiting short grass prairies and dry forests.
Calosoma tepidum
lukewarm beautiful black searcher
Calosoma tepidum is a large ground beetle in the family Carabidae, subfamily Carabinae, first described by LeConte in 1851. It belongs to the 'caterpillar hunter' group within the genus Calosoma, characterized by large size and predatory habits. The species is flightless despite possessing fully developed wings, a condition attributed to thoracic muscle reduction. It has been the subject of recent genomic research as part of a model system for studying wing evolution in insects.
Calosoma wilkesii
Wilkes's beautiful black searcher
Calosoma wilkesii is a flightless ground beetle in the family Carabidae, commonly known as Wilkes's beautiful black searcher. It is one of approximately 120 species in the genus Calosoma, a group known as "caterpillar hunters" for their predatory habits on lepidopteran larvae. The species has been the subject of genomic research due to its brachypterous (short-winged) condition, which represents an evolutionary transition to flightlessness. It occurs in western North America from British Columbia to California.
Carabus auratus
Golden Ground Beetle
Carabus auratus, commonly known as the golden ground beetle, is a flightless predatory beetle in the family Carabidae. Native to central and western Europe, it has been introduced to North America. Adults are diurnal hunters that prey on insects, snails, and worms using digestive secretions to subdue prey. The species is considered beneficial in agricultural settings due to its predation on pest species such as the Colorado potato beetle.
Carventinae
Carventinae is a subfamily of flat bugs (Aradidae) comprising over 364 species across 118 genera. The group is predominantly tropical in distribution and exhibits a strong trend toward flightlessness, with only seven genera retaining large, functional wings. New Zealand hosts eight recognized genera, six of which are endemic to the region.
Ceratocanthinae
Pill Scarab Beetles
Ceratocanthinae is a subfamily of scarabaeoid beetles within Hybosoridae, comprising approximately 366 species in 43 genera distributed across three tribes. These small beetles (2.0–10.0 mm) are renowned for their unique ability to perform complete conglobation—rolling their body into a tight ball by curling three body trunk segments and folding their tibiae. This defensive behavior, which evolved once in the Mesozoic, represents the only known complete conglobation in insects and is supported by specialized exoskeletal structures and thickened, mechanically reinforced dorsal cuticle.
Cercopedius
Cercopedius is a genus of broad-nosed weevils (Curculionidae: Entiminae) established by Sleeper in 1955. The genus contains at least one described species, C. artemisiae. It belongs to the tribe Trachyphloeini, a group of flightless weevils characterized by fused elytra and reduced wings.
Chasmatonotus
Chasmatonotus is a genus of non-biting midges in the family Chironomidae, subfamily Orthocladiinae. The genus contains approximately 14 described species and exhibits a disjunct distribution spanning Japan, the Nearctic region, and Continental Asia. Adults are fully winged but non-flying, a distinctive trait among chironomids. The genus was historically considered restricted to Japan and North America until the 2023 discovery of a species in Korea.
Cleonini
Cleonini is a tribe of weevils within the subfamily Lixinae, comprising approximately 96 extant genus-group taxa distributed globally. All extant members are hypothesized to be flightless despite frequently possessing fully developed wings (macropterous), a unique condition among Lixinae. The tribe exhibits widespread adult morphological homoplasy that obscures phylogenetic relationships, with many genera radiating from a common ancestor with weakly resolved internal branching. Cleonini are primarily associated with arid and semi-arid habitats, including deserts and steppe environments across North Africa, the Middle East, Central Asia, and western North America.
Coelocnemis
darkling beetles, broad-necked darkling beetles
Coelocnemis is a genus of darkling beetles in the family Tenebrionidae, containing approximately seven described species distributed across western North America. These large, flightless beetles are primarily associated with coniferous forest habitats, particularly pine and oak-conifer woodlands, where they are active nocturnally. The genus is distinguished from superficially similar darkling beetles by distinctive morphological features, including parallel lines of yellow pubescence on the inner tibial surfaces.
Coelocnemis punctata
Coelocnemis punctata is a darkling beetle in the family Tenebrionidae, one of seven species in the genus Coelocnemis found in western North America and adjacent southern Canada. The genus is characterized by distinct parallel lines of yellow pubescence on the inner surface of the tibiae, a feature used to distinguish it from the superficially similar genus Eleodes. Adults are flightless, with fused elytra that reduce water loss, and are typically associated with pine forests and oak-conifer woodlands rather than desert ecosystems.
Coelocnemis rugulosa
Coelocnemis rugulosa is a species of darkling beetle in the family Tenebrionidae, described by Doyen in 1973. It belongs to a genus of seven species found in western North America and adjacent southern Canada. Like other Coelocnemis species, it is a flightless, nocturnal beetle adapted to xeric forest habitats. The genus is distinguished from the superficially similar Eleodes by having distinct parallel lines of yellow pubescence on the inner surface of the tibiae.
Conocephalus brevipennis
Short-winged Meadow Katydid
The short-winged meadow katydid (Conocephalus brevipennis) is a small, flightless katydid native to North America and the Caribbean. Males produce species-specific stridulations by rubbing forewing structures together to attract mates. Females are distinguished by a prominent sword-like ovipositor used to deposit eggs in protected locations. The species is active primarily in late summer and autumn.
Cyphocleonus achates
knapweed root weevil
Cyphocleonus achates is a Eurasian root-feeding weevil introduced to North America as a classical biological control agent against invasive knapweeds, particularly spotted knapweed (Centaurea maculosa) and diffuse knapweed (C. diffusa). Adults are flightless, large-bodied weevils that feed on foliage, while larvae cause significant damage by mining into root cortex and inducing gall formation. The species has established populations across much of the western United States and is considered one of the most damaging root-feeding insects on knapweed in its native range.
Cysteodemus armatus
inflated beetle, inflated blister beetle
Cysteodemus armatus is a flightless blister beetle in the family Meloidae, distinguished by its dramatically inflated elytra that form a rounded, dome-like covering. The species occurs in arid and semi-arid regions of southwestern North America and Central America. Its fused wing covers render it incapable of flight, an unusual trait among beetles. The beetle's distinctive appearance and defensive chemistry align with typical meloid characteristics, though specific ecological details remain poorly documented.
Daihiniodes hastifera
Arizona sand-treader cricket
Daihiniodes hastifera is a flightless cricket known as the Arizona sand-treader cricket. It belongs to the family Rhaphidophoridae, commonly called camel crickets or cave crickets. The species is endemic to arid regions of western North America. Its common name reflects its specialized adaptation to sandy desert habitats.
Dasycerus
Dasycerus is the sole extant genus in the rove beetle subfamily Dasycerinae, comprising 25 recognized species. Nine cryptic species were recently discovered in 2024, previously attributed to D. carolinensis, distinguishable only by male aedeagal dissection or DNA analysis. The genus exhibits notable intraspecific genetic diversity and cryptic speciation, particularly in montane populations.
Dasycerus carolinensis
Dasycerus carolinensis is a flightless rove beetle endemic to the southern Appalachian Mountains of eastern North America. Phylogeographic studies reveal deep genetic divergence between populations east and west of the French Broad River, with divergence estimated at approximately 5.8 million years ago. The species inhabits forest leaf litter and shows evidence of cryptic differentiation across its range. Despite being flightless, it has persisted across both old-growth forest fragments and secondary growth forests.
Diaulota
Diaulota is a genus of flightless intertidal rove beetles in the family Staphylinidae, subfamily Aleocharinae. The genus comprises approximately eight described species distributed across Pacific coasts of the Northern Hemisphere. Despite being flightless, Diaulota species have achieved a trans-Pacific distribution through coastal dispersal, with some lineages crossing the Pacific Ocean directly via sea surface currents. The genus is notable for its remarkable biogeographic history and specialized intertidal habitat.
Diaulota fulviventris
Diaulota fulviventris is a flightless intertidal rove beetle in the family Staphylinidae. It is one of two species in a lineage that crossed the Pacific Ocean directly from the northwestern Pacific to the northeastern Pacific, likely via sea surface currents, rather than following the coastal route taken by most congeners. The species occurs in western North America and Mexico.
Dichromorpha viridis
Short-winged Green Grasshopper
Dichromorpha viridis is a common slant-faced grasshopper found throughout North America. Males are typically bright green with a dorsally slanting face, while females are usually larger and brown. This species exhibits environmentally induced sexual color dimorphism, with females occasionally appearing green and males rarely brown. It is a short-winged, flightless insect that inhabits grassy areas.
Dienerella filum
Common Plaster Beetle
Dienerella filum, known as the common plaster beetle, is a minute fungus beetle in the family Latridiidae. Adults measure 1.2–1.6 mm and are brown in colour. The species has near-cosmopolitan distribution and is strongly associated with human-built environments, particularly damp buildings with mould growth. It is flightless, lacking hind wings, and feeds exclusively on mould hyphae and spores.
Dracotettix
dragon lubbers
Dracotettix is a genus of flightless grasshoppers commonly known as dragon lubbers, placed in the family Romaleidae. The genus contains at least three described species, including the notably large and distinctive Dracotettix monstrosus. These insects are characterized by their robust, heavily built bodies and reduced wings. They are native to western North America, with records from California and northwestern Mexico.
Dracotettix monstrosus
Gray Dragon Lubber
Dracotettix monstrosus, the gray dragon lubber, is a large, flightless lubber grasshopper endemic to California. It belongs to the family Romaleidae, a group known for their aposematic coloration and chemical defenses. The species is notable for its distinctive common name reflecting both its draconic appearance and monstrous size relative to other grasshoppers.
Dromochorus knisleyi
Juniper Grove Tiger Beetle
Dromochorus knisleyi is a recently described tiger beetle species (2019) in the genus Dromochorus, a group of flightless, secretive beetles found in North America. The genus Dromochorus contains some of the most enigmatic and poorly known tiger beetles on the continent. Related species in this genus are characterized by highly restricted distributions, specialized habitat requirements, and extreme difficulty in detection and study due to their rapid running behavior and tendency to disappear into vegetation or soil cracks. The specific epithet honors tiger beetle specialist C. B. Knisley.
Dromochorus pilatei
Cajun Tiger Beetle, Cajun Dromo Tiger Beetle
Dromochorus pilatei is a species of tiger beetle in the family Cicindelidae, commonly known as the Cajun Tiger Beetle. It is endemic to a restricted range in the south-central United States, specifically Texas and Louisiana. The species belongs to the genus Dromochorus, a group of flightless, fast-running tiger beetles that inhabit open, eroded clay and loam habitats. Like congeners, it is likely secretive and easily overlooked due to its rapid movements and tendency to seek cover in vegetation or soil cracks.
Dromochorus pruininus
Frosted Dromo Tiger Beetle
Dromochorus pruininus is a small, flightless tiger beetle with a highly restricted and disjunct distribution across the south-central United States. The species inhabits exposed clay and gypsum slopes with sparse vegetation, where it runs swiftly between grass clumps to escape detection. Long considered a synonym of D. belfragei, it was reinstated as a valid species based on smooth elytra contrasting with the granulated surface of its congener. The species exhibits crepuscular activity patterns and remains one of North America's most poorly known tiger beetles, with larvae described only in 2008.
Dromochorus welderensis
Gulf Prairie Tiger Beetle
Dromochorus welderensis is a tiger beetle species described in 2019 from Texas, USA. It belongs to the genus Dromochorus, a group of flightless, fast-running tiger beetles associated with open, eroded clay habitats. The species is named for the Welder Wildlife Refuge in Texas, where it was discovered. As a recently described species, detailed information about its biology remains limited.
Dyslobus verrucifer
Dyslobus verrucifer is a species of broad-nosed weevil in the family Curculionidae, subfamily Entiminae. It was described by Casey in 1895. The species is known from the Pacific Northwest region of North America, with records from British Columbia south through Washington, Oregon, Idaho, and Montana. Like other members of the tribe Byrsopagini, it is a flightless weevil with a compact, heavily sclerotized body form.
Eleodes
pinacate beetles, desert stink beetles
Eleodes is the largest genus of darkling beetles in North America, comprising approximately 200 species. These beetles are endemic to western North America, ranging from southern Canada to central Mexico, with some species introduced to Colombia. Commonly known as pinacate beetles or desert stink beetles, they are flightless due to fused elytra and vestigial hindwings. All species possess chemical defense glands that produce quinone compounds, and many exhibit distinctive head-standing behavior when threatened. The genus shows remarkable ecological diversity, with species occupying deserts, forests, grasslands, and caves.
Eleodes cordata
desert stink beetle, clown beetle
Eleodes cordata is a species of darkling beetle in the family Tenebrionidae, commonly referred to as a desert stink beetle or clown beetle. The species is part of a large genus of flightless, ground-dwelling beetles native to arid and semi-arid regions of North America. Like other Eleodes species, it possesses defensive chemical capabilities and exhibits the characteristic "headstand" defensive posture when threatened. The species was described by Eschscholtz in 1829.
Eleodes longicollis
desert stink beetle, clown beetle
Eleodes longicollis is a species of darkling beetle in the family Tenebrionidae, commonly known as the desert stink beetle or clown beetle. It is a large, flightless beetle native to arid regions of the southwestern United States and northern Mexico. The species is notable for its distinctive defensive behavior of raising its abdomen and standing on its head when threatened, a posture that has earned members of the genus the common name 'clown beetles.' Like other Eleodes species, it possesses defensive glands capable of producing noxious secretions.
Endeodes
soft-winged flower beetles
Endeodes is a genus of soft-winged flower beetles in the family Melyridae, containing approximately six described species. Members of this genus are flightless beetles that have been documented visiting flowers, including California golden poppy, where they acquire pollen. The genus was established by LeConte in 1859 and is distributed in North America.
Floritettix aptera
Wingless Florida Grasshopper
Floritettix aptera, commonly known as the wingless Florida grasshopper, is a species of spur-throated grasshopper in the family Acrididae. The specific epithet "aptera" refers to its wingless condition, a distinctive trait among grasshoppers. The species is endemic to Florida and belongs to the genus Floritettix, which is part of the diverse Melanoplinae subfamily.
Floritettix nigropicta
dark-painted scrub grasshopper, wingless scrub grasshopper
Floritettix nigropicta is a wingless, spur-throated grasshopper endemic to the central sand ridgeways of Florida. It is classified within the family Acrididae and subfamily Melanoplinae. The species is flightless, a trait reflected in its common name 'wingless scrub grasshopper.'
Gymnoscirtetes
Gymnoscirtetes is a genus of small (11–22 mm), slender, flightless grasshoppers endemic to the southeastern North American Coastal Plain. The genus was revised from two to six species based on male genital morphology and geographic data. Species are divided into two groups: the western morsei group (G. morsei, G. rex) and the eastern pusillus group (G. pusillus, G. pageae, G. wadeorum, G. georgiaensis). The genus is characterized by vestigial wings, linear body shape, and brownish-green or bronze coloration with a black lateral stripe.
Hapithus
Hapithus is a large genus of flightless bush crickets comprising over 200 described species, primarily distributed across the Americas. Formerly treated as a separate genus, Orocharis has been synonymized with Hapithus and is now recognized as a subgenus. The genus is the namesake of the tribe Hapithini within the family Oecanthidae. These crickets are characterized by their inability to fly, a trait that distinguishes them from many related bush crickets.
Heterelmis
riffle beetles
Heterelmis is a genus of aquatic beetles in the family Elmidae, commonly known as riffle beetles. The genus includes several described species, with Heterelmis comalensis being particularly notable as an endangered species endemic to spring systems in Texas. Members of this genus are fully aquatic, inhabiting oxygen-rich flowing water environments where they feed on microbial biofilms. Some species have reduced or non-functional wings, limiting their dispersal ability and making them vulnerable to habitat degradation.
Heterelmis comalensis
Comal Springs riffle beetle
Heterelmis comalensis is a federally endangered aquatic beetle endemic to two spring systems in Texas. Described in 1988, this flightless species measures approximately 2 mm and inhabits shallow gravel substrates in spring riffles fed by the Edwards Aquifer. The species has been the focus of intensive conservation research, including captive breeding programs and studies on sexual dimorphism identification.
Hybosoridae
scavenger scarab beetles, scavenger and pill scarab beetles
Hybosoridae is a family of scarabaeiform beetles comprising over 600 species in 78 extant genera. Members are small (5–7 mm), oval beetles with distinctive antennae bearing a deeply grooved 8th antennomere that houses the 9th and 10th segments. The family was historically recognized as distinct based on unique larval characteristics, particularly the stridulatory behavior of rubbing front legs against the epipharynx margin. Formerly, the family Ceratocanthidae was merged into Hybosoridae, expanding its constituency.
Hylobius warreni
Warren's rootcollar weevil, Warren rootcollar weevil
Hylobius warreni is a flightless weevil native to boreal forests of Canada, where it is a significant pest of coniferous trees. Adults feed on bark of spruce, pine, and other conifers before oviposition, while larvae tunnel in the root collar region, often girdling and killing young trees. The species has emerged as a particular concern in areas affected by mountain pine beetle outbreaks due to increased reforestation efforts. Population levels are influenced by stand density, tree age, and depth of duff material around tree bases.
Idiostatus inyo
Inyo Shieldback
Idiostatus inyo is a species of shieldback katydid in the family Tettigoniidae, described by Rehn & Hebard in 1920. It is endemic to California and is associated with the Inyo Mountains region, from which its specific epithet derives. The species belongs to a genus of flightless, ground-dwelling katydids commonly known as shieldbacks due to their enlarged, shield-like pronotum that covers much of the thorax and wings. Like other Idiostatus species, it is adapted to arid and semi-arid mountain environments.
Idiostatus wymorei
Wymore's Shieldback
Idiostatus wymorei is a shieldback katydid described by Caudell in 1934. It belongs to the genus Idiostatus, a group of flightless katydids characterized by reduced wing pads and shield-like pronota. The species is known from California and is among the least documented members of its genus, with very few observations recorded.
Issus coleoptratus
Issus coleoptratus is a flightless planthopper in the family Issidae, notable as the first species in which the function of gear-like structures on nymph hind legs was described. These intermeshing gears synchronize leg movement during jumping. Adults measure 5.5–7.0 mm and vary from light brown to nearly black. The species has one generation per year and feeds on phloem of various deciduous trees.
Largus sculptilis
bordered plant bug
Largus sculptilis is a true bug in the family Largidae, commonly known as a bordered plant bug. Like other members of the genus Largus, adults are black with orange or red trim along the margins of the body. Nymphs display striking aposematic coloration: metallic blue-black with a prominent scarlet dot on the dorsal midline. The species occurs in western North America and Middle America. Adults are flightless and can be confused with stink bugs (Pentatomidae), leaf-footed bugs (Coreidae), or cotton strainers (Pyrrhocoridae).
Leiodidae
Round Fungus Beetles
Leiodidae is a globally distributed family of small beetles containing approximately 3,800 described species. Commonly known as round fungus beetles, many species exhibit a compact, globular body form, though some are more elongated. The family encompasses diverse ecological specializations including fungivory, detritivory, carrion-feeding, and subterranean cave-dwelling. About half of all described species are flightless due to reduced or absent wings. The tribe Leptodirini represents one of the most diverse radiations of subterranean animals, with over 1,300 species adapted to cave habitats.
Lepilius chisosensis
Lepilius chisosensis is a weevil species in the family Curculionidae, described from the Chisos Mountains of Texas in 2012. It belongs to a genus of flightless weevils associated with high-elevation habitats in the southwestern United States and Mexico. The species is known from a limited number of specimens and has been documented in coniferous forest environments.
Leptophyes punctatissima
Speckled Bush-cricket
Leptophyes punctatissima, commonly known as the Speckled Bush-cricket, is a flightless bush-cricket species distributed across most of Europe. It belongs to the subfamily Phaneropterinae and exhibits distinctive acoustic behavior where both sexes stridulate. Males produce calling songs to which females respond with brief chirps, creating a duetting communication system. The species has been studied extensively for its auditory physiology and directional hearing capabilities.
Leptopinara
Leptopinara is a genus of broad-nosed weevils (Curculionidae: Entiminae) established by O'Brien in 1981. The genus belongs to the tribe Byrsopagini, a group of flightless weevils often associated with soil or leaf litter habitats. Species in this genus are characterized by their elongated, slender body form relative to other byrsopagine weevils. The genus is known from the United States.