Add Yahoo as a preferred source to see more of our stories on Google. The sound of cicadas humming gives way to high-pitched squeaking. The sky darkens. Some people settle into folding chairs and turn ...

As the sun sets, the sound of bats emerging from Bracken Bat Cave in southern Comal County grows from a few flutters to a rainstorm. By midnight, 10 million to 20 million Mexican free-tailed bats, the ...

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 ...