Greater Rhea

Identification

The greater rhea is the largest native bird in the Americas, an unmistakable flightless giant standing 1.4 to 1.7 metres tall, with some exceptional males reaching nearly 1.83 metres. Adults weigh 20–27 kilograms on average, though large males can exceed 35 kilograms. The bird's most striking features are its long, strong legs with three forward-facing toes, elongated neck, and relatively small head and bill. Males are noticeably larger and darker than females.

Plumage is fluffy and tattered-looking, typically grey or brown with considerable individual variation. The head, neck, rump, and thighs are fully feathered. Males display darker colouration overall, while females are lighter. Interestingly, leucistic individuals with white plumage and blue eyes, as well as albinos, occur in the wild, particularly in Argentina. Young birds are grey with dark lengthwise stripes. During courtship and running, the bird uses its rather long wings to maintain balance during tight turns.

Range & Habitat

The greater rhea is native to eastern South America, with populations across Argentina, Bolivia, Brazil, Paraguay, and Uruguay. The species inhabits a variety of open landscapes including grasslands dominated by satintail and bahiagrass, savanna, scrub forest, chaparral, and even desert and palustrine wetlands, though it favours areas with at least some tall vegetation. It is absent from humid tropical forests and typically prefers lower elevations, seldom exceeding 1,200 metres.

Remarkably, a feral population has established itself in Northern Germany since the 2000s. This population began when one male and five females escaped from a farm in Schleswig-Holstein in August 2000 and survived the winter in a sufficiently similar habitat. The population has grown substantially, reaching approximately 250 birds by late 2017, and these birds are now considered permanently settled in the Nordwestmecklenburg region.

Behaviour & Diet

The greater rhea is notable for its distinctive reproductive habits, which set it apart from many other bird species. During the breeding season in spring and summer, birds stay near water sources. The species is highly adapted to running, using its wings for balance during rapid turns and for elaborate courtship displays. In the wild, the greater rhea has a life expectancy of 10.5 years.

Best Time & Places to See It

For the best viewing opportunities, visit the grasslands, savannas, and open wetlands of Argentina, Bolivia, Brazil, Paraguay, or Uruguay where the species is native. The breeding season in spring and summer offers the best chance to observe birds near water, when they are most active and engaged in breeding behaviour. Birds prefer open areas with at least some tall vegetation rather than densely forested regions.

Photography Tips

The greater rhea's large size and preference for open habitats make it a rewarding subject for wildlife photographers. The bird's impressive height and long legs create striking compositional opportunities, especially when photographed against expansive grassland or savanna backdrops. Male birds' darker plumage contrasts well in bright conditions, while the variation in individual colouration—including the rare leucistic and albino individuals—offers unique photographic subjects. Capture the birds' distinctive running posture and wing movements during locomotion for dynamic images, and watch for their elaborate courtship displays during the breeding season.