The RHEA is the largest bird in the Americas, belonging to the family Rheidae. It is native to South America and is found in Argentina, Bolivia, Brazil, Paraguay, and Uruguay. It is a flightless bird that can reach up to 1.5 meters in height and weigh up to 20 kilograms. The RHEA is an omnivore, feeding on plants, insects, small mammals, and other small animals. It is also known for its ability to run at speeds of up to 50 kilometers per hour.