This is one of the most common bats in North America. The colony at Bracken Cave in Texas numbers 20 million bats in the summer. They begin emerging two hours before sunset, and consume a quarter million pounds of insects each night. Females are able locate their young in such large colonies using a combination of vocalizations and odor.

Note how the feeding buzz still sounds like a buzz even at slow speed.

Photo courtesy of Merlin D. Tuttle © Bat Conservation International.

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