Bats in Winter Bats have several options for winter due to loss of insects. Migrate South Hibernate Combination of both

Migration The regular, seasonal movement of certain species Bats, butterflies, birds, whales Bats fly 100-1000 miles to their destination Use vision and familiar landmarks (lakes/rivers) Some travel in groups with birds

Obstacles During Migration Radio towers High rise buildings Severe weather Lack of food Destruction/alteration of habitat

What is Hibernation? An adaptation to conserve stored energy when supplies are otherwise low An extended state of torpor Temperature normally 100F degrees, drops to 32-50F Breathing slows Heart rate slows 1000 beats/minute to 20/minute

Hibernaculum Can be found in caves, mines, rocky crevices, tree cavities, buildings Need a constant temperature and humidity (78%) Bats awaken periodically to drink, urinate, shift location every 12-19 days Can go up to 83 days Disturbing bats more often can use up valuable stored energy

PA Migrating Bats Hoary Silver haired Red

PA Hibernating Bats Little Brown Big Brown Small Footed

PA Hibernating Bats cont. Indiana Bat Long Eared Bat Eastern Pipistrelle