Answer:
Bats are mammals and not birds because:
They feed their young one's milk from mammary glands. Birds do not do that.
Bats give live birth. Birds lay eggs.
Bats have fur. Birds have feathers.
Bats do not flap their entire forelimbs, like birds, but instead flap their spread out digits which are very long. and covered with a thin membrane or patagium.
The wings of bats are much thinner than those of bird.
Category : Mammals
Next Question: Why do snakes bite humans?
Previous Question: Why is a whale, mammal and not a fish?