The head and forward parts are dark and hardened and the rest is paler and soft. Each bagworm is covered by a bag made of white silk with bits of the host plant spun onto the outer surface. The pupae are dark brown. Male pupae are slender and female pupae are fatter. The pupal stage occurs inside the bag.
Males are small, brown hairy moths with dark wings that clear with age.
Eggs are spherical or oblong and about 0.8 mm by 1.0 mm. Eggs are found in the mother's bag inside her pupal cast skins. Biology Bagworms occur throughout North Carolina. Bagworms have a very wide host range but are usually associated with arborvitae or juniper. A single bagworm does relatively little harm as it feeds on leaves.