The Lesser Rhea is a large, flightless bird of South American plains. Adult feather tips are white, and it uses its wings to steer while running.
The adult is flightless, has white feather tips, and has three toes on each foot. Juveniles are browner and lack the white spots; adult plumage develops in the third year.
Darwin’s Rheas use Patagonian steppe. In Chile’s Aysen region, grazing pressure, hunting, dogs and nest destruction have affected populations, while fences obstruct movements.
In 2025, fifteen birds were moved from Argentina’s Patagonia Park to Chile’s Patagonia National Park and released after health checks and acclimation.
A separate 2024 release involved twenty-three young. Population reinforcement and genetic diversity are objectives alongside habitat recovery and retaining the bird’s seed-dispersal role.
IUCN Red List (conservation institution account) · Least Concern · Global
Local pressures include livestock land use, hunting, dogs, nest destruction and fencing. Managed breeding, translocation and release are combined with habitat restoration.