Mammals are animals that are warm blooded, have a backbone, hair, and feed their young milk. Mammals include very large animals like the blue whale which can grow up to 100 feet long! Mammals also include very tiny animals like the hog nose bat. We are even mammals! There are over 4000 different species of mammals.
Mammals can live all over the world in many different climates. They can live in the artic like the polar bear, or the desert like the camel. Some mammals even live in the ocean like the bottlenose dolphin. Some mammals can fly like the bat.