Aspen Carpenterworm
Common NameAspen Carpenterworm
Scientific NameAcossus undosus
FamilyCossidae
SubfamilyCossinae
Wingspan (mm)65
Primary Colorswhite, black, grey
HabitatDeciduous forests, woodlands, riparian areas
Geographic RangeEastern and Central North America
Host Plantsaspen, poplar, willow, birch, ash, oak
Flight PeriodJune to August
Conservation Statusleast-concern
Lifecycle NotesLarvae are wood-borers, spending 2-4 years tunneling within the trunks and branches of various deciduous trees before pupating. Adults are short-lived and primarily focused on reproduction.
Identification TipsDistinguished by its large size, robust body, and the intricate, mottled black, white, and grey forewing pattern that mimics tree bark. Look for distinct black markings on the forewings.
Description
A large, robust moth with forewings cryptically patterned in mottled white, black, and grey, providing excellent camouflage against tree bark.
