The flightless greater rhea is a master of the pampas and a surprise immigrant

Countries & Cities · Published 3 October 2026 Swipe more like this →

In short: The greater rhea is South America's largest bird, a flightless relative of the ostrich that uses its wings as rudders for high-speed turns. While native to the open grasslands of the pampas, this resilient species has unexpectedly established a thriving, wild population in the farmlands of Northern Germany.

Standing up to five feet tall, the greater rhea is a formidable presence in the South American landscape. Though its wings are useless for flight, they serve a critical mechanical purpose: they act as stabilizers, allowing the bird to maintain balance and execute sharp, rapid maneuvers while sprinting across open terrain. These birds are opportunistic omnivores, consuming everything from seeds and fruits to insects and small lizards. Their tendency to forage on agricultural crops has frequently put them at odds with local farmers, a conflict that intensifies as natural grasslands are converted into farmland.

The rhea's reproductive strategy is as distinct as its appearance. The species is polygamous, with males taking on the role of the primary caregiver. During the breeding season, multiple females deposit their eggs into a single nest designed by the male. A single nest can contain 50 or more eggs, all of which the male incubates for six weeks. Once the chicks hatch, the male becomes fiercely protective, aggressively charging at any creature—including other rheas—that ventures too close to his brood.

Perhaps the most curious chapter in the rhea's history began in August 2000, when a small group escaped from a farm in Groß Grönau, Germany. Finding the local habitat sufficiently similar to their native range, the birds not only survived the winter but began to breed successfully. By autumn 2018, the German population had surged to 566 individuals. This rapid expansion has created a modern ecological challenge, leading authorities to authorize population control measures, including the destruction of eggs and regulated hunting, to mitigate the impact on local harvests.

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