Bats are mammals, and like all mammals, they have hair and are warm-blooded, meaning that they partly control their body temperature from the inside. Bats are the only mammals that are capable of true flight. There are over 1000 species of bats throughout the world in several habitats.
Most bats are nocturnal, meaning they are mostly active at night. Many species spend the day hours hiding away in caves or within trees. Whereas some species are solitary, others live in groups numbering thousands of individuals. Species vary in size, with the largest known kind being the Pteropus bat.
Depending on the species, items on a bat's menu include insects, fish, frogs and fruit. A few species drink blood, mainly from large mammals such as cattle or horses. A bat both finds food and navigates by means of echolocation, which consists of the creature sending sound waves out in front of it. If the waves bounce back to the bat, then the creature knows that there is either food or an obstacle in front of it. Bat ears are among the most sensitive among mammals.
Baby bats are pups. They possess no hair when they are born, but have powerful grips to cling to their mothers or cave walls. Like most mammals, pups nurse from their mothers.