There are over 900 species of bats found around the world. Bats make up 20 percent of all the mammal species found on Earth. Bats are the only flying mammals! They have a thin membrane of skin that stretches from the four digits of their forelimbs down the sides of their bodies to their hind legs.
Most bats are insectivores, but some species eat fruit and pollen. Most bat species are nocturnal, and most species have a good eyesight but use echolocation to navigate and locate prey.