The term 'Australian Bird, Flightless' can be summarized by two crossword solutions: EMU (3 letters) and CASSOWARY (9 letters). The EMU is the second-largest living bird in the world and is native to Australia. It is a flightless bird with long legs and a long neck. The CASSOWARY is a large, flightless bird native to Australia and New Guinea. It has a distinctive black plumage and a bright blue neck. Both the EMU and the CASSOWARY are important to the ecology of Australia and are protected by law.