* Give birth to live young: Mammals give birth to live young, while birds lay eggs. Bats, like other mammals, give birth to live pups.
* Nurse their young: Mammals nurse their young with milk produced by mammary glands. Bats do this as well.
* Have fur: Mammals have fur or hair. Bats are covered in fur.
* Warm-blooded: Both mammals and birds are warm-blooded, meaning they can regulate their own body temperature.
* Breathe air: Mammals breathe air with lungs. Bats, like other mammals, breathe air.
While bats can fly, this doesn't make them birds. Flight evolved independently in bats and birds. Bats are more closely related to other mammals like dogs, cats, and humans.