Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

See Moth submissions from National Moth Week 2023

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Species Adelphagrotis indeterminata - Hodges#10991

Adelphagrostis indeterminata - Adelphagrotis indeterminata Unidentified Moth, Probably Owlet of some kind - Adelphagrotis indeterminata  10991 - Adelphagrotis indeterminata - Adelphagrotis indeterminata Adelphagrotis indeterminata ? - Adelphagrotis indeterminata Unknown Noctuid - Adelphagrotis indeterminata Noctuidae: Adelphagrotis indeterminata - Adelphagrotis indeterminata 10991   - Adelphagrotis indeterminata Adelphagrotis indeterminata
Show images of: caterpillars · adults · both
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Lepidoptera (Butterflies and Moths)
Superfamily Noctuoidea (Owlet Moths and kin)
Family Noctuidae (Owlet Moths)
Subfamily Noctuinae (Cutworm or Dart Moths)
Tribe Noctuini
Subtribe Noctuina
Genus Adelphagrotis
Species indeterminata (Adelphagrotis indeterminata - Hodges#10991)
Hodges Number
one of 3 species in this genus in North America listed at All-Leps
wingspan presumably similar to A. stellaris (in the 30-40 mm range)
Adult: forewing medium to dark gray, slightly paler in lower medial area; reniform spot whitish to pale yellow with dark shading at top and bottom; black basal dash almost reaches AM line; black strip runs from AM line through orbicular and reniform spots to PM line; AM and PM lines black, wavy, indistinct; subterminal line a series of pale faint dots; hindwing dirty white basally, shading to gray distally, with darker veins and thin discal lunule; fringe pale yellowish with some dark spots at tips of veins; thoracic collar black; top of thorax brownish-gray laterally, with slightly paler middorsal strip
British Columbia to California
forests in the far west
adults fly mainly from August to October, with a few records from May to July
larvae feed on leaves of flowering trees and shrubs
See Also
Abagrotis glenni forewing has a long basal dash extending to the PM line, and a reniform dash extending to the subterminal line; Abagrotis mirabilis forewing is completely dark except for an unmarked pale reniform spot; Adelphagrotis stellaris forewing lacks a basal dash, and its reniform spot is dark orange mixed with gray
dark forms of Euxoa tessellata are similar, but reniform spot is darker, showing less contrast against ground color, basal dash is less distinct, and thoracic collar is not black (see image)
Xestia xanthographa forewing lacks a basal dash, and top of thorax is uniformly dark (see image)
Internet References
description of adult plus foodplants (Jeff Miller, Macromoths of Northwest Forests and Woodlands, USGS)
presence in California giving specimen locations and dates (U. of California at Berkeley)
presence in Oregon; list 25 specimens in collection, including locally collected specimens (Oregon State U.)
distribution in Canada British Columbia only (U. of Alberta, using CBIF data)