Gypsy moth life cycle
Eggs hatch in late spring. Caterpillars eat leaves through midsummer. Caterpillars pupate and transform into moths in late July and August. Moths live only a few days to mate, lay eggs and then die. Only male moths fly. Eggs are laid on most any ...
Eggs are laid on most any hard surface in clusters of 500-1,000 eggs that can survive over winter. Source: University of Minnesota