The largest bird in South America, it can reach 180 cm and 25 kilograms. Large round grey body, with powerful long legs, and a long neck with a small head and beak. Although completely flightless, this bird has a wingspan of nearly 1.5 meters and can run up to 60 km/h, using its wings to balance and dodge predators. Usually found in groups, feeding mainly on vegetation such as leaves, fruits and buds, but also occasionally will feed on small reptiles and rats. Widely distributed in the Paraguayan Chaco's savannas.