The koala (Phascolarctos cinereus), sometimes called the koala bear, is an arboreal herbivorous marsupial native to Australia. It is the only extantrepresentative of the family Phascolarctidae. Its closest living relatives are the wombats. The koala is found in coastal areas of the island's eastern and southern regions, inhabiting Queensland, New South Wales, Victoria, and South Australia. It is easily recognisable by its stout, tailless body and large head with round, fluffy ears and large, dark nose. The koala has a body length of 60–85 cm (24–33 in) and weighs 4–15 kg (9–33 lb). Fur colour ranges from silver grey to chocolate brown. Koalas from the northern populations are typically smaller and lighter in colour than their counterparts further south. These populations possibly are separate subspecies, but this is disputed.

Koala Temporal range: 0.7–0 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓ Middle Pleistocene – Recent