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dwk001: Entrance to Frio Bat Cave, 20 April 2014
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dwk001: Cave Swallows, 20 April 2014
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dwk001: Mexican Free-tailed Bats, 20 April 2014
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dwk001: Mexican Free-tailed Bats, 20 April 2014
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dwk001: Mexican Free-tailed Bats, 20 April 2014
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dwk001: Mexican Free-tailed Bats, 20 April 2014
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dwk001: Mexican Free-tailed Bats, 20 April 2014