Aussie critters are some of the most iconic animals in Australia. The two most well-known Aussie critters are the kangaroo, or 'roos' (4 letters), and the koala (6 letters). Both of these animals are native to Australia and have become symbols of the country. Roos are known for their powerful legs and hopping ability, while koalas are known for their cuddly appearance and love of eucalyptus leaves.