Bruce Spanworm (Operophtera bruceata)
Operophtera bruceata, the Bruce Spanworm, or “winter moth” is a species of moth of the family Geometridae. It is found from coast to coast in southern Canada and the northern parts of the United States. The wingspan of the males is 25–30 mm. Females have underdeveloped wings and do not fly.
Resembles Autumnal Moth, but FW is variably pale gray to sooty brown. Small black discal spot present. Terminal line is single black dots.
Hosts: Deciduous trees, including aspen, beech, maple and willow.