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August 21
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Bracken Cave Preserve
7515 Bracken Cave Road
San Antonio, TX 78266 United States
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Bracken Cave is the summer home of more than 20 million Mexican free-tailed bats (Tadarida brasiliensis), making it the world’s largest bat colony and one of the largest concentration of mammals on earth.

The emergence of these millions of bats, as they spiral out of the cave at dusk for their nightly insect hunt, is an unforgettable sight.


  • Members supporting BCI with a $45 annual membership and those who have added an annual membership to an adopt-a-bat may bring up to 3 guests. Members supporting BCI monthly or with a $60 or more annual membership may bring up to 5 guests.
  • Members may attend one Member Bat Flight at Bracken each season (1 Membership = 1 Member Bat Flight per year). Subject to availability. Bat flights fill quickly.
  • If you are NOT already a member, join here. Unsure about your membership status? Email membership@batcon.org

For more information visit https://www.batcon.org/see-bats-live/visit-bracken-cave-preserve/book-a-member-night/