They open their mouth and let out an echo, it bounces back to them and they know if there's a tree or something in their way. They eat bugs. Bats are very intelligent creatures. Vampire bats don't suck out your blood. Bats won't get tangled in your hair.
Bats eat all sorts of things like frogs, insects, and mice.
If you see a bat don't pick it up because it could be sick. Bats help us, too. Vampire bats lap blood. Some bats have big ears. Some bats eat insects, fruit, and drink blood.