Rheas are flightless birds that are native to South America. They are popularly known as the "American ostrich" but they also have other names. Some synonyms for rheas are nandu, choique, and suri. In Argentina, they are referred to as Ñandú, while in Chile, they are called Choique. The name Suri is commonly used in Peru, Bolivia, and Ecuador. Rheas are similar to ostriches in appearance but are smaller. They have long legs and a distinctive head that is covered in feathers. Rheas are omnivores and feed on a variety of plants and animals, including insects, rodents, and fruits. They are important to the ecosystem and their population status is currently stable.