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Bat Migration

Only Available in Archive Formats.
Bat Migration

Bat Migration

Bat Migration

Only Available in Archive Formats.

America's forty-four species of bats are losing large caves...their traditional hibernation spots...to recreational spelunkers and tourists. But hundreds of thousands of bats have taken over abandoned copper mines in northern Michigan. In the first part of a two-part National Geographic Radio Expedition series, NPR's Christopher Joyce follows biologists deep into the earth in search of these bat sanctuaries.