Click on the pictures for larger view. Webs are located in crotch of tree Caterpillars remain in tents during the day and feed on leaves at night. White racing stripe on dorsum of caterpillar distinguishes the Eastern Tent Caterpillar from many early season caterpillars Eastern tent caterpillar egg mass on twig. This is the overwintering stage Forest Tent Caterpillar is a forest pest that is closely related. Note the key-hole pattern of white spots on the dorsum.
Defoliation occurs early in the year.