Deep within caves sleep hundreds of vampire bats hanging upside down. When the darkest hour of night approaches, the creatures open their eyes, rustle their wings, and soar into the night. They’re hungry—for blood!
Vampire bats are the only mammals on Earth that feed entirely on blood. While they do occasionally bite people, their main victims are cattle, sheep, and horses.
The bats pierce skin with their razor-sharpteeth. Then they lap up the flowing blood for about 30 minutes with their tiny tongues. In one year, a colony of vampire bats can drink enough blood to equal that of 25 cows!