Some species live in trees. Bats seem uncommon in many regions because they roost in dark places and come out only at night, when most people are asleep. Bats hang upside down when they are 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 the year around.
About 40 species of bats live in Canada and the United States. Through the centuries, people have passed on many superstitions and mistaken ideas about bats. All species of bats can see, probably about as well as human beings. The beliefs that bats carry bedbugs and get tangled in people's hair are also untrue. Bats tend to be timid.