For almost two centuries, Floreana Island in the Galápagos was missing something enormous.
Giant tortoises — the gentle, lumbering architects of the island's ecosystem — had been gone since the mid-1800s, hunted to local extinction by whalers and devastated by invasive rats and goats that destroyed their habitat and devoured their eggs.
This week, 158 giant tortoises walked across Floreana's volcanic soil for the first time in nearly 200 years. And they're not just visitors — they're coming home.
The story of how they got there is one of the most remarkable conservation tales of our time.
It begins in 2000, when ecologists discovered something extraordinary on neighbouring Isabela Island: a hybrid tortoise carrying Floreana giant tortoise DNA. The lineage everyone assumed was lost forever had actually survived, mixed into the genetics of Isabela's tortoise population.
What followed was a painstaking, decades-long selective breeding programme run by the Galápagos National Park and the Charles Darwin Foundation. Scientists identified tortoises with the highest percentage of Floreana ancestry and carefully bred them over multiple generations to maximise that heritage.
Meanwhile, Floreana itself was being prepared. Invasive goats that had stripped the island's vegetation were removed. A massive operation eliminated invasive rats — one of the largest island rat eradication projects ever completed. The ecosystem was slowly healing, making way for the tortoises' return.
'Giant tortoises are a critical part of this ecosystem,' said Rakan Zahawi, executive director of the Charles Darwin Foundation. 'By dispersing seeds, shaping vegetation, creating microhabitats, and influencing how landscapes regenerate, they help rebuild ecological processes that many other species depend on.'
The 158 tortoises released this week range from juveniles to young adults. They'll be monitored closely as they establish themselves, but researchers are optimistic — the island's vegetation has recovered significantly since the removal of invasive species, providing ample food and habitat.
The reintroduction is part of a broader vision to restore Floreana's entire ecosystem to something closer to its pre-human state. Other native species are also being considered for reintroduction as the island's ecology stabilises.
For conservationists worldwide, Floreana offers proof that even the most devastating ecological losses can sometimes be reversed — if we're willing to commit the time, science, and patience required.
On a volcanic island in the Pacific, 158 tortoises are slowly exploring their ancestral home. They have nowhere to rush. They have all the time in the world. And after 175 years, so does Floreana. 🐢