Bat Flights, Hidden History & Hill Country Magic: Discover the Secrets of the Frio Bat Cave
Each spring, millions of visitors — both human and winged — flock to Texas’ Hill Country River Region. Just outside Concan, Texas, nestled in the scenic Annandale Ranch, a remarkable natural event unfolds: 10–12 million Mexican free-tailed bats migrate from Mexico to their summer home in the Frio Bat Cave, creating one of the most spectacular wildlife displays in the world.
Every night at dusk, waves of bats spiral into the sky, devouring crop pests and supporting local agriculture — a natural wonder and a scientific goldmine. Over the years, researchers have studied the bats’ diet, migration patterns, and even their potential use in WWII’s secretive Project X-Ray. Yes, really — a government plan once aimed to weaponize bats!
The Annandale Ranch, owned by six generations of the Cofer family since 1889, has seen everything from Civil War-era guano harvesting to fiery cave combustions and a rabies research study in the 1950s. Today, thanks to conservation easements, this 14,000-acre legacy ranch remains protected and pristine.
Want to witness the bat flights yourself? The Cofer family and the Walkers offer public tours through FrioBatFlight.com, inviting you to experience this rare and mesmerizing event.
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