Bracken Cave Preserve
Jonathan Alonzo

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.

The 2021 Bat Flight season at Bracken Cave Preserve runs from June through September.

The 2021 season includes both virtual and in-person opportunities to experience the wonder of bats at Bracken Cave Preserve.


  • A registration access code will be emailed to members the week of April 12, or included in the membership confirmation email for those joining or renewing after that time. You will need this code to register for any of the member-only events (virtual or in-person).
  • 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).
  • If you are NOT already a memberjoin here. Unsure about your membership status? Email

In-Person Member Bat Flights

(registration opens Jun 1 noon CT)
(registration opens Jul 1 noon CT)
(registration opens Aug 1 noon CT)
Fri Jun 11 SOLD OUTThu Jul 8Thu Aug 5Sat Sep 4
Sat Jun 12 SOLD OUTFri Jul 9Sat Aug 7Fri Sep 10
Wed Jun 16 SOLD OUTSat Jul 10Fri Aug 13Sat Sep 11
Fri Jun 18 (adult only) SOLD OUTSat Jul 17 (adult only, $10/pp)Fri Aug 20Thu Sep 16
Thu Jun 24 SOLD OUTFri Jul 23Sat Aug 21Fri Sep 17 (adult only, $10/pp)
Sat Jun 26 SOLD OUTThu Jul 29Fri Aug 27 (adult only, $10/pp)Sat Sep 25
Sat Jul 31

Member-Only Virtual Bat Flights – Join us for member-only virtual Bracken Bat Flights via Zoom April 16 (“Opening Night”), April 22 (Earth Day), and every Thursday night from May through September. Use the access code provided by email (the same code used to schedule an in-person bat flight-see above) to register. Registration is open.

Other Member-Only Virtual Experiences – Join us to experience the world of bats, virtually. We’ll explore Bracken Cave Preserve and bats around the world through a number of member-only online experiences including Bracken Briefs and Bat Briefs (mini sessions with specific bat-related themes) and events meant to bring you inside the world of bats. Details and registration information coming soon!

2021 Public Opportunities

  • A limited number of public opportunities to attend a bat flight in person and virtually have been added this year.

In-Person Bat Flights

(registration is open now)
(registration opens noon CT June 1)
(registration opens noon CT July 1)
(registration opens noon CT August 1)
Thu June 17Thu Jul 15Fri Aug 6Fri Sep 3
Fri Jun 25Fri Jul 30Thu Aug 12Thu Sep 9
Wed June 30Sat Aug 28

Virtual Bat Flights – Experience the thrill of 20 million bats emerging from their summer home at Bracken Cave Preserve – virtually. No registration needed, just join in at 7:30pm Central Time at on the first Friday of every month from May through September, April 17 (International Bat Appreciation Day), May 9 (Mother’s Day), June 5 (World Environment Day), August 29 (International Bat Night), and September 12 (Grandparent’s Day). (start time subject to change)

Other Virtual Experiences – Additional opportunities to experience the world of bats virtually will be added soon.

If you are trying to book a group visit for your club, troop, class or other organization, email

For other commonly asked questions about visiting Bracken Cave Preserve, check out our Visitation FAQS.