The term 'Down Under Birds' refers to the two species of flightless birds found in Australia and New Zealand, the emu and the kiwi. The emu is the largest bird native to Australia and the second-largest extant bird in the world after the ostrich. It is a large, flightless bird with long legs and a distinctive brown and grey plumage. The kiwi is a small, flightless bird native to New Zealand and is the smallest living ratite. It has a long bill, short wings, and strong legs. Both the emu and the kiwi are iconic symbols of their respective countries.