Semirelict Underwing Moth
Common NameSemirelict Underwing Moth
Scientific NameCatocala semirelicta
FamilyErebidae
SubfamilyErebinae
Wingspan (mm)60
Wing Patterncryptic
Primary Colorsgrey, orange, black
HabitatDeciduous and mixed woodlands, riparian areas
Geographic RangeWestern North America, including the Pacific Northwest and Rocky Mountains
Host PlantsPopulus tremuloides, Populus trichocarpa, Populus balsamifera
Flight PeriodLate July to October
Conservation Statusleast-concern
Lifecycle NotesEggs overwinter, hatching in spring. Larvae feed on the leaves of Populus species, pupating in early summer. Adults emerge in late summer and are active into the fall.
Identification TipsKey identification features include the mottled grey and brown forewings, which hide the bright orange hindwings. The hindwings display two distinct black bands, with the inner band being broader, and a white outer fringe.
Description
This medium-sized moth features cryptically patterned grey and brown forewings that effectively camouflage it against tree bark, while its hindwings are a striking orange with two prominent black bands and a white fringe.
