Western Underwing Moth
Common NameWestern Underwing Moth
Scientific NameCatocala faustina
FamilyErebidae
SubfamilyErebinae
Wingspan (mm)55
Primary Colorsgrey, brown, red, black
HabitatWoodlands, forests, riparian areas, and chaparral where host plants are present
Geographic RangeWestern North America, from British Columbia south to California and east to Colorado and New Mexico.
Host Plantsoak, willow, poplar
Flight PeriodJuly to October
Conservation Statusleast-concern
Lifecycle NotesEggs are laid in bark crevices and overwinter, hatching in spring. Larvae feed on host plant leaves, pupate in leaf litter or soil, and adults emerge in late summer.
Identification TipsKey features include the cryptically patterned grey forewings and the distinct red hindwings with two black bands, the outer band being narrower and followed by a white fringe. Its western North American range is also a strong indicator.
Description
This moth features mottled grey and brown forewings that provide excellent camouflage, contrasting sharply with its vibrant red hindwings marked by two prominent black bands and a white-fringed margin.
