This is devious: Mexican free-tailed bats have jamming sonar to disrupt competitor bats' food hunting. It's like there aren't enough insects for everyone to eat!
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By U.S. Fish and Wildlife Service Headquarters [CC BY 2.0 (http://creativecommons.org/licenses/by/2.0) or Public domain], via Wikimedia Commons
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Mexican free-tailed bats
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