- The flightless great rhea is the largest bird of South America. They have a body length between 4.1 ft and 4.5 ft and weigh up to 27 kg. The large wings of greater rheas are useless for flying. But they use these large wings for balancing their body while moving. The wings also help them to changing direction while running.
- The greater rheas mainly found in grass and wetlands. Their diet includes insects, lizards, and small birds. Like ostrich, greater rheas have powerful long legs, use them for defending on facing threats. Females lay eggs in a single nest, can be found more than 50 eggs within a single nest.