frio cave

At Frio Cave, See Bats, Birds, and Beetles—Oh My!

June 17, 2019 | By By Karen Hoffman Blizzard

Each summer, 10 to 12 million Mexican free-tailed bats roost in this cave, making it the second-largest single-mammal colony in the world. The bats spend their winters in Mexico, and each spring, they migrate to Texas to establish “maternity” colonies. The females stay from about March through October and give birth to their babies in mid-June.

Get the Magazine

Save up to 62% off the cover price


Sign Up for Our Newsletters

Sign up for magazine extras, upcoming events, Mercantile specials, subscription offers, and more.