Rheas are from South America only and are limited within the continent to Argentina, Bolivia, Brazil, Chile, Paraguay, Peru, and Uruguay. They are grassland birds and both species prefer open land. The Greater Rhea live in open grasslands, pampas, and chaco woodlands. They prefer to breed near water and prefer lowlands, seldom going above 1,500 metres (4,900 ft).
Rheas are large, flightless birds with gray-brown plumage, long legs and long necks, similar to an ostrich. These birds can reach 5.6 feet and weigh up to 88 pounds. Their wings are large for a flightless bird and are spread while running, to act like sails. Pictured below is a Rhea and several chicks that are camouflaged among the stones. The male Rhea sits on tbe nest until the chicks hatch.