The term Aussie Ostrich is a combination of two animals native to Australia: the EMU and the ostrich. The EMU is a large, flightless bird that is the second-largest living bird by height, after the ostrich. The EMU is a common sight in Australia, where it is the national bird. The ostrich is the largest living bird species, and is also native to Australia. Both birds are found in the wild, and are farmed for their meat, eggs, and feathers.