Some live in trees. Bats seem uncommon in many regions because they stay in dark places and come out only at night when most people are asleep. Most kinds of bats hang up side down when resting. There are more than 900 species of bats. Bats live in all parts of the world except Antarctica and the Arctic.
Most kinds make their home in the tropics, where they can find food all year.
Some bats can bite people and then they fly away.