Birds can fly and bats can,too.But a bat is not a kind of bird.Bats are mammals.A bat has four legs.A bird has only two.Bats have teeth and birds have no teeth.Bats have large ears but birds' ears are only holes in the head.All bats like to eat insects.They eat at night and sleep in the daytime.Bats have eyes,but they can't see well.They can feel where a thing is.That is why the bats can fly in the evening.