Even though it's unfortunate to have to care for a hibernaculum through the winter months when all you needed to do to get your caterpillar to bypass hibernation is expose your second instar larva to 24 hours of light, it can still be a fun and enjoyable experience to look for lorquin's admiral hibernacula during the late fall or winter months.  When willow trees drop their leaves, hibernacula remain on the tree and can look quite conspicuous; especially on smaller trees.