The wings of a bat are similar to human hands with extended fingers which form the structure of the wings. Bats are found almost all over the world, with the exception of the coldest climates. There are approximately 900 species of bats known to man, more than any other mammal exept rodents. Bats are nocturnal or crepuscular, meaning they are active at night or during dawn and dusk hours. They sleep during the day upside down, hanging from a roost by their well-developed feet.
Some bats also hibernate during the colder months.
Often this is bad for bats because they may be disturbed by the people gathering the guano. The two suborders of the Chiroptera are Megachiroptera and Microchiroptera. The Megachiroptera are larger animals, commonly called fruit bats and flying foxes. These bats are fruit and flower eaters and rely heavily on their vision. The Microchiroptera are smaller and although not blind, they rely more on echolocation than vision.