Expired January 1, 2021 5:59 AM
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Mexican free-tailed bats, one of over 1400 bat species in the world, migrate from Mexico to Texas each spring to give birth to their young in caves across the Hill Country. One of these caves in particular — Bracken Cave — houses 20 million bats each year, making it the largest congregation of mammals in the world. Take a virtual visit to this cave to view an incredible wildlife spectacle and learn about the folks who are working to preserve this cave and many others for future generations. 

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    United States