Marsupial Australian is a term used to describe animals that are native to Australia, such as the KOALA, WOMBAT, and WALLABY. The KOALA is a small, tree-dwelling marsupial with five letters in its name. The WOMBAT is a burrowing marsupial with six letters in its name. The WALLABY is a small to medium-sized marsupial with seven letters in its name. All three of these animals are native to Australia and are considered marsupials.