They live on every continent of the world, except Antarctica. Bats do not live in areas where it is very hot or very cold, and there are some remote islands that are not home to bats. The largest bats live in warm areas, while smaller bats live in both warm and cold places. Where winters are cold, bats migrate to a warmer climate or hibernate. When bats hibernate, they gather in large groups of hundreds and sleep together for warmth.
Bats are the only mammals that can fly.
Mother bats have one baby in their litter. The baby bats are called pups. When a pup is born, it usually has no hair and its eyes are closed. It clings to the mother bat and drinks milk from her. When the pup is about four months old, it learns to fly.