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Bat-Nado! 20 Million Bats Majestically Fly, Feast Nightly

Nat Geo's Casey Anderson heads to San Antonio to film Mexican free tail bats.
05:50 | 09/13/2013

Transcript for Bat-Nado! 20 Million Bats Majestically Fly, Feast Nightly

Forget shark NATO get ready to behold a nonfiction -- NATO or creepy creatures crammed into one dark dank -- suddenly. Rush out any whirlwind forty million wings. Come from vampires bloodsuckers. --... See More
This transcript has been automatically generated and may not be 100% accurate.
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