A fully grown koala weighs about 9 kilograms and its body is at most about 62 centimeters long. Its fur is thick and woolly, its limbs are long, and its toes are stongly clawed. on each front foot the two innermost digits can be opposed to the others like two thumbs as can the innermost digits on each rear foot. It is this articulation, or moveable joint, that makes the koala a good climber. on the ground, to which it normally descends only to move from one tree to another, the koala goes on four limbs. Most of the time it is in a tree, intermittently sleeping and foraging all among the leaves by day and at night.