Australian critters are some of the most iconic animals in the world. The KOALA, a marsupial native to Australia, is a five-letter word for an Australian critter. The KOALA is known for its large, fluffy ears and its diet of eucalyptus leaves. Another three-letter word for an Australian critter is roo, which is short for kangaroo. Kangaroos are marsupials that are native to Australia and are known for their powerful hind legs and long tails. The last three-letter word for an Australian critter is EMU, which is a large, flightless bird native to Australia. Emus are the second-largest living bird in the world and are known for their long necks and powerful legs.