Photo by R. Randell.
Adult moths are drab gray, delicate with green markings.
Males have a wingspread of about 1 inch while the females are wingless. They arch their back into a loop, anchor the hind legs and extend the front to move ahead. Larvae grow to 1 inch, are variable in color and marked predominantly with green, brown and pale yellow longitudinal stripes. There are many other species of inchworms many of these are cryptically colored. Inchworms may sometimes be confused with loopers which are in the family Noctuidae.