ocr: RHEAS FAN-SHAPED HEAS ARE LARGE birds that live Rin South America. There are two WINGS species, and they are usually found in flocks. Each flock contains about two dozen birds, although sometimes larger groups form. Rheas escape danger by running, and they also hide by lying on the ground. Young rheas are downy and striped, which FEATHERED probably acts as camoutlage, but they NECK lose this patterning as they grow. GREATER RHEA THREE- Unlike ostriches, rheas bave TOED three-tocd feet, and their neck is FEET covered with short feathers. KEY FACTS