Add Yahoo as a preferred source to see more of our stories on Google. Bracken Cave in Texas is home to 15-20 million Mexican free-tailed bats. Female bats head to the cave every year to give birth.

The sound of cicadas humming gives way to high-pitched squeaking. The sky darkens. Some people settle into folding chairs and turn their heads to the sky as little black blobs shoot out of a storm ...

David Wechuli and other researchers are studying bats living in cave systems in Kenya, to better understand how they interact with their environment and how human activities affect bat habitat.

Every evening, millions of bats swarm out of a single cave in Texas, making it one of the most stunning natural phenomena to witness. The colony is so huge that it turns the sky black as they begin ...