Bats are mammals. Like other mammals, including ourselves and many of our pets, they have hair or fur on their bodies and are warm-blooded. A baby bat feeds on its mother's milk for at least a few weeks after it is born. Bats are the only mammals that can fly. read more
Most do, yes. They're mammals, and most mammals have fur in order to stop their blood getting too cool. This is why reptiles (which have no fur) need to bask on rocks to gain the energy to move. read more