The RHEA is a flightless bird from South America. It is the largest bird in the continent and is related to the ostrich and emu. It is found in open grasslands, savannas, and scrublands of Argentina, Brazil, Bolivia, Paraguay, and Uruguay. It has long legs and a long neck, and its feathers are grayish-brown. The RHEA is an omnivore, eating mostly plants, insects, and small animals. It is also known for its powerful running ability and can reach speeds of up to 50 km/h.