Finding Caterpillars > Admiral Hibernacula

Third instar caterpillars of the subgenus Basilarchia that feed on willows, cottonwoods, aspens, service berries, cherries, and other trees construct a rolled leaf hibernaculum and then overwinter inside it. Recognizing and finding hibernacula is not too difficult; especially during the winter months when the leaves have fallen from the trees and the hibernacula remain.