Emas (American Rhea) are ratites (flightless birds, with unkeeled sterna) in the genus Rhea, native to South America. Emas are large, flightless birds with gray-brown plumage, long legs and long necks, similar to an ostrich. These birds can reach 1.7 m and weigh up to 40 kg.  Their wings are large for a flightless bird and are spread while running, to act like sails. Unlike most birds, Emas have only three toes. Emas are found in fields of the Pantanal and Pampas in Brazil.They have brown to back-gray feathers. The male is distinguished by having black in the base of the neck, chest and part of the front. It differs from Avestruz (Ostrich) for not having tail and pigóstilo. They are omnivorous and prefer to eat broad-leafed plants, but also eat seeds, roots, fruit, lizards, beetles, grasshoppers.