Baby mammals are born live.
Baby mammals drink their mother’s milk.

Mammals are vertebrates. They have bones inside their bodies.
Most mammals have four legs.
Mammals breathe with their lungs.
Mammals have hair.

There are many different kinds of mammals.
Elephants, zebras, dogs and cats are all mammals.

Some mammals live in the sea.
Dolphins, seals and whales are mammals.

Bats are mammals.
Humans are mammals, too.