Mongabay · Climate & nature

Darwin's Rheas Reintroduced to Chilean Patagonia

A women-led team at Patagonia National Park is working to reintroduce Darwin's rheas, a species that nearly disappeared due to historical ranching practices. This effort is part of a larger rewilding initiative.

The Rewilding Chile Foundation is preparing to release 13 Darwin's rheas in April 2026. Rangers provide care, protecting birds from threats like pumas and grazing.

The Chacabuco Valley's landscape, fragmented by fences from ranching, nearly led to the rhea's extinction. Tompkins Conservation is removing fences to allow wildlife to reclaim the area.

This reintroduction is the third release of the year, representing nearly a full year of preparation. The birds undergo a two-month acclimation period.

Rangers protect rheas from predators with specialized fencing. Ensuring good nutrition and body condition is also a priority for the birds' survival.

The rhea is crucial for seed dispersal, aiding steppe restoration. Increased sightings of chicks and wildlife interactions indicate positive ecosystem shifts.

Fences remain a challenge for wildlife. Long-term conservation requires time for ecosystem and human adaptation after over a century of ranching.

Release day is influenced by weather. Rangers select sites considering factors like proximity to guanacos, with whom rheas share ecological similarities.

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