Bracken Bat Cave, home to the largest concentration of mammals on the planet with 20 million Mexican free-tail bats, is opening up to the general public for a brief period.
This is awesome.
Related: A review of the Sigma 17-70mm lens for videographers
A few years ago, Jen and I saw the surreal exodus at dusk. So many bats fly out of the cave to feed, they create their own vortex.
Express-News Photographer Billy Calzada shot a very cool video of the bats in action. Check out the time-lapse photos.
