The New World Ostrich, also known as the RHEA, is a large flightless bird native to South America. It is the largest bird in the Americas and is closely related to the emu and the cassowary. The RHEA is an omnivore, eating both plants and small animals. It is a fast runner and can reach speeds of up to 40 mph. The RHEA is an important part of the local ecosystem, helping to disperse seeds and control insect populations.