terrestrial_animal bird 새 emu 부리 beak ratite vertebrate flightless_bird casuariiformes 척추 동물 greater_rhea grassland

Emus

Like kangaroos, emus are from Australia. They are flightless birds similar in looks and characteristics to ostriches, though they average about 10 inches shorter in height. Unlike ostriches, emus can not walk backwards; however, it's not known why. Emus are known for their fast sprinting and long distance running. They're the only bird species that has calf muscles.