(Photo taken on 03/25/09 by Marvin)
Kent's Geometer Moth (Selenia kentaria)
One of the many Geometridae moths that inhabit the central and eastern mixed hardwood forests of North America. Unlike most moths, this species holds its wings overhead as do butterflies. Larva is an "inch worm" caterpillar that mimics a twig. (See here for photo)
Sources:
BugGuide
University of Alberta
.
