"People come from all over the world to watch nature at its finest in the form of the Brazilian free-tailed bats leaving the cave each evening in the summer. The size of the colony fluctuates from night to night and season to season. Between 200,000 and 500,000 bats call the cave home over the summer, swelling to over one million during migration."
Bats In Flight, Carlsbad Caverns National Park
![Silhouetted bats flying through a partially-sunlit cave and out the main entrance in Carlsbad Caverns National Park](https://www.nationalparkstraveler.org/sites/default/files/styles/panopoly_image_full/public/photos/potw/cave_nps-bat_flight.jpg?itok=W1icEEMg)
National Park Service
Monday, May 10, 2021
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