The South American Ratite is a large flightless bird that is native to South America. The most common species of this bird is the RHEA, which is a four-letter word. Rheas are large, long-legged birds with a long neck and small head. They have greyish-brown feathers and can reach up to 6 feet tall. They are omnivorous, eating both plants and small animals. Rheas are found in open grasslands, savannas, and scrublands throughout South America.