The term Australian Creature can be summarized by the crossword solution of WALLAROO, which is an 8-letter marsupial native to Australia. Wallaroos are closely related to kangaroos and wallabies, and are typically found in open grasslands and woodlands. They have a stocky build and a long, thick tail, and are usually gray or brown in color. Wallaroos are herbivores, and feed on grasses, leaves, and other vegetation.