Noctuidae
Guides
Euxoa
miller moths, cutworm moths
Euxoa is a genus of noctuid moths established by Jacob Hübner in 1821, comprising approximately 305 species distributed primarily across dry and semi-dry regions of the northern hemisphere. The genus is notably absent from South-East Asia and Australia. Larvae are cutworms that feed on surface vegetation and occasionally climb plants. The genus includes the army cutworm moth (Euxoa auxiliaris), a significant agricultural pest whose adult aggregations serve as a critical food source for grizzly bears in the Greater Yellowstone Ecosystem.
Euxoa absona
Euxoa absona is a species of noctuid moth described by Lafontaine in 1987. It belongs to the genus Euxoa, a large group of owlet moths commonly known as darts or cutworms. The species is part of the diverse Noctuidae family, which includes many agricultural pest species. Very little specific information is documented about this particular species.
Euxoa albipennis
White-striped Dart
Euxoa albipennis is a noctuid moth first described by Augustus Radcliffe Grote in 1876. It is distributed across southern Canada and the northern United States, with western populations extending to New Mexico, Arizona, and California. The species has a wingspan of 30–35 mm. Larval host plants include Oxytropis, Lupinus, Melilotus, Helianthus, Solanum tuberosum, and Zea mays.
Euxoa atomaris
Euxoa atomaris is a noctuid moth species first described by Smith in 1890. Adults are active from July to September and have a wingspan of 30–34 mm. The species is distributed across western North America from the northern Great Plains to the southwestern United States. Three subspecies are recognized: E. a. atomaris, E. a. detesta, and E. a. esta.
Euxoa atristrigata
Euxoa atristrigata is a noctuid moth species described by Smith in 1890. It occurs in western North America from British Columbia and Saskatchewan southward to California. As a member of the genus Euxoa, its larvae likely share the cutworm habit of feeding at or below the soil surface on plant stems, though species-specific biology remains poorly documented.
Euxoa auripennis
Euxoa auripennis is a noctuid moth described by J. Donald Lafontaine in 1974. It occurs in western North America from the Great Plains to the Pacific coast. Adults fly in late summer with a single annual generation. The species is one of many Euxoa cutworms whose larvae feed on herbaceous vegetation.
Euxoa aurulenta
Dune Cutworm Moth, dune cutworm
Euxoa aurulenta, the dune cutworm, is a noctuid moth species described by Smith in 1888. It is distributed across central and western North America, with adults active from May to July. The species has a single annual generation and is associated with dune grass habitats. The larvae are suspected to feed on beach grasses including Ammophila breviligulata and Calmovilfa longifolia.
Euxoa basalis
Euxoa basalis is a noctuid moth species distributed across western North America, from the Canadian prairie provinces south through the Rocky Mountain region to the southwestern United States. The species is considered abundant in the Rocky Mountain region. Adults have a wingspan of approximately 35 mm. The immature stages have been described in biosystematic studies of the genus Euxoa.
Euxoa bicollaris
Euxoa bicollaris is a noctuid moth in the genus Euxoa, characterized by a wingspan of approximately 32 mm. The species is endemic to western North America, with its core distribution in California and range extending northward to southern British Columbia. As a member of the cutworm moth group, its larvae likely exhibit typical cutworm feeding habits, though species-specific biological details remain poorly documented.
Euxoa bifasciata
Euxoa bifasciata is a species of cutworm or dart moth in the family Noctuidae, first described by Smith in 1888. The species is found in North America and is assigned Hodges number 10796. Three subspecies are recognized: E. b. bifasciata, E. b. bisagittifera Benjamin, and E. b. lowensis Benjamin. Like other Euxoa species, it is a nocturnal moth whose larvae are known as cutworms.
Euxoa biformata
Euxoa biformata is a noctuid moth described by Smith in 1910. The species occurs in western North America from British Columbia south to California. Available information is limited; specific details about its biology, larval hosts, and ecology remain undocumented in the accessible literature.
Euxoa brevipennis
Euxoa brevipennis is a noctuid moth described by Smith in 1888. The species has a wingspan of approximately 33 mm. It occurs in western North America, with records from the Canadian provinces of British Columbia, Alberta, and Saskatchewan, and the U.S. states of Utah, Colorado, and California. The specific epithet 'brevipennis' refers to short wings, though detailed morphological descriptions beyond wingspan are not readily available in the literature.
Euxoa brunneigera
Euxoa brunneigera is a noctuid moth species occurring in western North America from British Columbia south to California. Adults have a wingspan of approximately 30 mm and exhibit variable coloration ranging from grey to brown. The species belongs to the genus Euxoa, which includes numerous cutworm species whose larvae are agricultural pests.
Euxoa camalpa
cutworm, dart moth
Euxoa camalpa is a noctuid moth species in the family Noctuidae, native to North America. The species is recognized by the Hodges number 10772 and comprises two described subspecies: E. c. camalpa and E. c. manca. Like other Euxoa species, it is classified as a cutworm or dart moth, with larvae that typically exhibit cutworm feeding behavior.
Euxoa campestris
Flat Dart
Euxoa campestris, commonly known as the flat dart, is a species of noctuid moth first described by Augustus Radcliffe Grote in 1875. It is found across much of North America, with a broad distribution spanning from Newfoundland to Alaska and southward through mountain ranges and eastern deciduous forests. The species has a single annual generation, with adults active from July to September. The wingspan ranges from 30–34 mm.
Euxoa castanea
Euxoa castanea is a moth species in the family Noctuidae described by J. Donald Lafontaine in 1981. It is found in western North America, with a wingspan of 35–38 mm. Adults are active from July to August, with one generation per year. The species belongs to a large genus of cutworm moths, many of which are agricultural pests.
Euxoa choris
Euxoa choris is a noctuid moth described by Leon F. Harvey in 1876. It occurs across western North America from the Yukon and Canadian prairies south to the southwestern United States. Adults are active during summer months with a single annual generation. The species is one of many Euxoa moths attracted to ultraviolet light sources.
Euxoa churchillensis
Alpine Dart, Churchill euxoa moth
Euxoa churchillensis, known as the Alpine Dart or Churchill euxoa moth, is a noctuid moth species described by McDunnough in 1932. It is characterized by small forewings measuring 10–13 mm in length. The species occupies a distinctive geographic range spanning subarctic Canada and alpine regions of the Rocky Mountains, suggesting adaptation to cold environments. Limited specific ecological data exists for this species, though its placement in the genus Euxoa indicates likely cutworm-type larval biology.
Euxoa cicatricosa
Scarred Dart
Euxoa cicatricosa is a noctuid moth species first described in 1865. Adults have a wingspan of 29–32 mm and are active from August to September. The species has one generation per year and occurs across western North America from southern Canada to the southwestern United States.
Euxoa cinereopallidus
Euxoa cinereopallidus is a moth species in the family Noctuidae, described by Smith in 1903. It is found in western Canada and parts of the western United States. The wingspan is approximately 32 mm. Like other Euxoa species, it is a cutworm moth, with larvae that likely feed on vegetation and may be agricultural pests.
Euxoa cinnabarina
cutworm, dart moth
Euxoa cinnabarina is a species of cutworm moth in the family Noctuidae. It was first described by William Barnes and James Halliday McDunnough in 1918. The species is found in North America and is assigned the MONA/Hodges number 10797. As a member of the genus Euxoa, it belongs to a group of moths whose larvae are known as cutworms and can be agricultural pests.
Euxoa clausa
Euxoa clausa is a noctuid moth described by James Halliday McDunnough in 1923. It is restricted to the north-western Great Plains of North America, with a wingspan of approximately 33 mm. Adults are active in mid-summer, with one generation per year.
Euxoa comosa
hairy euxoa moth
Euxoa comosa is a noctuid moth native to northern North America, commonly known as the hairy euxoa moth. The species exhibits considerable geographic variation, with five recognized subspecies distributed across western North America eastward through the northern Great Plains to the Atlantic Ocean. Adults have a wingspan of approximately 32 mm. Larvae are cutworms that have been recorded feeding on Secale cereale (rye) and are likely generalist feeders on various plants.
Euxoa cona
Euxoa cona is a species of owlet moth in the family Noctuidae, described by Strecker in 1898. It belongs to a large genus of cutworm moths found primarily in North America. The species is recognized in major taxonomic databases but appears to have limited published biological documentation.
Euxoa conjuncta
Euxoa conjuncta is a species of owlet moth in the family Noctuidae, described by Smith in 1890. It belongs to the genus Euxoa, which includes numerous cutworm species that are agricultural pests. The species is recorded from North America. Like other Euxoa species, it likely has a life cycle involving egg, larval (cutworm), pupal, and adult stages, with larvae that may damage crops by cutting stems at or below the soil surface.
Euxoa costata
Euxoa costata is a noctuid moth species found in the Pacific Northwest of North America. It is particularly abundant in ponderosa pine forests east of the Cascade Mountains. The species has a wingspan of approximately 34 mm. Like other members of the genus Euxoa, it is a nocturnal species attracted to light.
Euxoa cryptica
Euxoa cryptica is a species of owlet moth in the family Noctuidae, described by Hardwick in 1968. It belongs to a genus containing numerous cutworm and dart moth species, many of which are significant agricultural pests. Very little specific information has been published about this particular species.
Euxoa declarata
clear dart
Euxoa declarata is a noctuid moth commonly known as the clear dart. Adults have a wingspan of 31–37 mm and are active from July to September with one generation per year. The species is notable for its reproductive isolation from closely related species (E. campestris and E. rockburnei), which is maintained primarily through differences in circadian mating rhythms rather than pheromone differences. Males of all three species respond to the same synthetic attractants. The species belongs to the 'declarata group' of Euxoa, a complex of interfertile sibling species that remain reproductively isolated in nature through temporal partitioning of mating activity.
Euxoa difformis
Differential Dart, Cutworm Moth
Euxoa difformis is a species of cutworm or dart moth in the family Noctuidae, first described by Smith in 1900. The species is found in North America, with distribution records from Alberta and Saskatchewan in Canada. As a member of the genus Euxoa, it is part of a diverse group of noctuid moths whose larvae are commonly known as cutworms.
Euxoa divergens
Divergent Dart
Euxoa divergens, commonly known as the divergent dart, is a noctuid moth native to North America. Adults have a wingspan of 31–35 mm and are active from May through September, with one generation per year. The species occupies a broad geographic range spanning from Newfoundland and Alaska southward to New York, Michigan, and the mountain regions of the western United States.
Euxoa dodi
Euxoa dodi is a species of owlet moth in the family Noctuidae, described by James Halliday McDunnough in 1923. It belongs to a genus containing numerous cutworm and dart moth species, many of which are agricultural pests. The species is poorly documented in scientific literature, with minimal information available regarding its biology, ecology, or economic significance. It appears to be a relatively obscure member of the North American noctuid fauna.
Euxoa edictalis
Euxoa edictalis is a moth species in the family Noctuidae, first described by Smith in 1893. The species has a wingspan of 35–39 mm and occurs in western North America from southern Alberta and Montana west to British Columbia, and south through California, Nevada, Utah, and Colorado. Adults are active in May in Alberta, with one generation per year. Like other Euxoa species, the larvae are likely cutworms that feed on plants, though specific host records for this species are not documented.
Euxoa excogita
Euxoa excogita is a noctuid moth described by Smith in 1900. It was formerly treated as a subspecies of Euxoa brunneigera. The species is known from western North America, with records from British Columbia south to California and east to Colorado. Like other Euxoa species, it likely has a typical noctuid life cycle with nocturnal adults and soil-dwelling larvae.
Euxoa flavicollis
Yellow-collared Dart
Euxoa flavicollis, commonly known as the Yellow-collared Dart, is a species of owlet moth in the family Noctuidae. It occurs in North America, with documented presence in the Canadian provinces of Alberta, Manitoba, and Saskatchewan. The species belongs to a genus containing many cutworm moths, though specific life history details for this particular species remain poorly documented.
Euxoa flavidens
cutworm moth, dart moth
Euxoa flavidens is a species of cutworm or dart moth in the family Noctuidae. It is found in North America. The species is assigned MONA/Hodges number 10758.
Euxoa foeminalis
Euxoa foeminalis is a species of cutworm moth in the family Noctuidae, described by Smith in 1900. As a member of the genus Euxoa, it is part of a diverse group of owlet moths whose larvae are commonly known as cutworms. The species occurs in North America, though specific details about its biology and ecology remain poorly documented in the available literature. Like other Euxoa species, it likely shares the general cutworm life history of nocturnal larvae that feed on plant stems and foliage.
Euxoa fumalis
Undusted Dart
Euxoa fumalis is a noctuid moth species described by Grote in 1873, commonly known as the Undusted Dart. It belongs to the diverse genus Euxoa, which contains numerous cutworm and dart moth species. The species is present in North America, though specific details regarding its biology, host associations, and economic importance remain poorly documented compared to better-known congeners such as Euxoa auxiliaris (Army Cutworm).
Euxoa guadalupensis
Euxoa guadalupensis is a species of cutworm or dart moth in the family Noctuidae, first described by Lafontaine & Byers in 1982. It belongs to a genus containing numerous agricultural pest species known for their larval "cutworm" behavior. The species is found in North America, though specific details about its biology, host plants, and economic significance remain poorly documented compared to better-known congeners such as Euxoa auxiliaris (army cutworm).
Euxoa hollemani
cutworm moth, dart moth
Euxoa hollemani is a species of cutworm or dart moth in the family Noctuidae. It is found in North America and has been assigned the MONA or Hodges number 10820. Like other Euxoa species, it is likely a nocturnal moth with larvae that feed on vegetation, though specific ecological details for this species are sparse in available sources.
Euxoa idahoensis
Idaho cutworm
Euxoa idahoensis is a species of cutworm moth in the family Noctuidae, first described by Grote in 1878. It belongs to a genus containing numerous agricultural pest species, though specific information about this particular species remains limited. The species is documented from western Canadian provinces including Alberta, Manitoba, and Saskatchewan. Like other Euxoa species, it likely overwinters as a larva and has a typical noctuid life cycle with soil-dwelling caterpillars and nocturnal adult moths.
Euxoa inconcinna
cutworm, dart moth
Euxoa inconcinna is a species of cutworm moth in the family Noctuidae. It is found in North America and has been recorded in Colorado. The species is part of a large genus of dart moths, many of which are agricultural pests as larvae. Adults are attracted to light sources.
Euxoa infausta
variable dart, dingy dart
Euxoa infausta, commonly known as the variable dart or dingy dart, is a species of cutworm moth in the family Noctuidae. The species is found in North America, with confirmed records from Alberta and Saskatchewan in Canada. Like other Euxoa species, it belongs to a genus whose larvae are known as cutworms—generalist feeders that can damage agricultural crops by cutting stems at or below the soil surface.
Euxoa intermontana
Euxoa intermontana is a species of owlet moth in the family Noctuidae, described by Lafontaine in 1975. As a member of the genus Euxoa, it belongs to a group commonly known as darts or cutworms. The species name "intermontana" (between mountains) suggests an association with intermountain regions. Like other Euxoa species, the larvae likely exhibit cutworm behavior, feeding on vegetation and potentially curling into a C-shape when disturbed. However, specific ecological details for this particular species remain poorly documented in available sources.
Euxoa laetificans
cutworm, dart moth
Euxoa laetificans is a species of cutworm or dart moth in the family Noctuidae, described by Smith in 1894. It is found in North America, with records from the Canadian provinces of Alberta and Saskatchewan. As a member of the genus Euxoa, its larvae are likely cutworms that feed on plants, though specific details for this species are not well documented.
Euxoa latro
cutworm, dart moth
Euxoa latro is a species of cutworm or dart moth in the family Noctuidae, first described by William Barnes and Foster Hendrickson Benjamin in 1927. It is found in North America. The species is assigned MONA/Hodges number 10848. Like other Euxoa species, it is part of a large genus of noctuid moths commonly known as cutworms due to larval feeding behavior.
Euxoa leuschneri
Euxoa leuschneri is a species of cutworm or dart moth in the family Noctuidae, first described by Lafontaine in 1987. It is found in North America. The species is assigned MONA/Hodges number 10722.1. Like other Euxoa species, it is likely a nocturnal moth with larvae that feed on vegetation, though specific biological details for this species remain poorly documented in the available literature.
Euxoa lewisi
Oregon Dart
Euxoa lewisi, commonly known as the Oregon Dart, is a species of cutworm or dart moth in the family Noctuidae. The species was described by Grote in 1873. It belongs to a genus of moths whose larvae are known as cutworms, feeding on plant stems at or below ground level. Two subspecies are recognized: Euxoa lewisi lewisi and Euxoa lewisi julia.
Euxoa lillooet
Lillooet Dart
Euxoa lillooet is a species of cutworm or dart moth in the family Noctuidae, described by James Halliday McDunnough in 1927. It is one of approximately 150 species in the genus Euxoa, a large group of noctuid moths commonly known as darts or cutworms. The species is found in North America, though specific details about its biology and ecology remain poorly documented in the scientific literature. Like other Euxoa species, the larvae are likely subterranean or surface-feeding cutworms that may damage herbaceous plants.
Euxoa lineifrons
Euxoa lineifrons is a species of cutworm or dart moth in the family Noctuidae. The species was described by Smith in 1890. Like other Euxoa species, it is a nocturnal moth whose larvae are known as cutworms. The MONA or Hodges number for this species is 10784, a standardized numbering system used for North American Lepidoptera identification.
Euxoa luctuosa
cutworm moth, dart moth
Euxoa luctuosa is a species of cutworm or dart moth in the family Noctuidae. It is found in North America. The species was described by J. Donald Lafontaine in 1976 and is assigned Hodges number 10775. As a member of the genus Euxoa, it belongs to a large group of noctuid moths commonly known as cutworms, many of which are agricultural pests.