Bats sleep upside down. No one knows. Scientists believe that it helps them blend into their surroundings. It is believed that some species of bats have such poor vision that they can use a method called sonar to see in the dark. Other species of bats have very good eyesight and use it for hunting.
Bats spend the daytime hours sleeping and cleaning themselves and hunt for food at night.
They also look for insects to eat while most other animals are asleep. It is also cooler at night so bats don't need to use a lot of energy. Bats are very misunderstood by people. There are many false beliefs and myths surrounding bats. For instance, bats are the only flying mammals.