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

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

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

4. 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

5. 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 days
Can go up to 83 days
Disturbing bats more often can use up valuable stored energy

6. PA Migrating Bats
Hoary
Silver haired
Red

7. PA Hibernating Bats
Little Brown
Big Brown
Small Footed

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