Kangaroos live together in small groups called mobs. A young kangaroo is called a joey. Kangaroos use their long tails to keep their balance when jumping or running. They have been known to jump 10 feet high and travel at speeds up to 40 mph. The platypus is a monotreme mammal about the size of a cat.
Monotremes are mammals that lay eggs.
The duck-billed platypus is ideally suited to life in the water. It has webbed feet and a paddlelike tail for swimming. The male has poisonous spines on its feet and the female does not have teats to feed her young, milk literally oozes from her skin. Like hamsters they have pouches in their cheeks to store food. The schools of Australia are just like ours in North America.