Koala bears are not bears but are in fact marsupials they belong to the same family as a kangaroo and wallaby. They sleep about 16 hours a day and rarely drink except during a drought when the leaves they eat contain less liquid. They live on a low energy food of eucalyptus leafs which leaves them slow moving and lethargic in appearance.
A young koala bear is called a Joey. It spends its early life in its mothers pouch drinking her milk, after a period of six months it also begins to feed on a substance which comes from its mothers poo called pap. The infant continues on this delicious diet of pap and milk till it is one year old.