Flightless birds of Australia are represented by the four-letter term EMUS. Emus are the largest native bird in Australia and are flightless, meaning they cannot fly. They are also the second-largest bird in the world, after the ostrich. Emus have long legs and can run up to 50 km/h. They are omnivorous, eating a variety of plants, insects, and small animals. Emus are found throughout Australia and are an iconic species of the country.