Theodore Carpenterworm Moth
Common NameTheodore Carpenterworm Moth
Scientific NameAcossus theodori
FamilyCossidae
SubfamilyCossinae
Wingspan (mm)75
Wing Patterncryptic
Primary Colorscream, dark brown
HabitatDeciduous and mixed forests, woodlands
Geographic RangeWestern North America (Rocky Mountains, Pacific Northwest)
Host PlantsPopulus, Salix, Alnus
Flight PeriodJune to August
Conservation Statusleast-concern
Lifecycle NotesLarvae are wood-borers, spending multiple years (2-4) tunneling within the trunks and branches of host trees. Pupation occurs within the larval tunnel.
Identification TipsLook for its large size, robust body, and the distinctive cryptic pattern of dark brown mottling on pale forewings. Often found resting on tree trunks.
Description
A large, robust moth with pale, creamy-white forewings heavily mottled and spotted with dark brown markings, providing excellent camouflage against tree bark. The head and thorax are dark brown.
