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Bats in Winter

Explore the fascinating world of bats in winter, where they migrate south, hibernate, or use a combination of both to survive. Discover the obstacles they face during migration, from radio towers to severe weather. Learn about hibernation and the hibernaculum where bats conserve energy and maintain their well-being. Identify the different species of migrating and hibernating bats, from Hoary to Eastern Pipistrelle. Gain insights into their behaviors and adaptations for winter survival.

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Bats in Winter

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  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 100-1000 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 12-19 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

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