First published April 28, 2020.
Left, an adult Galápagos giant tortoise; right, numbered eggs beside a young tortoise. Marking eggs and juveniles lets park staff follow each animal raised for release, and young tortoises like this were missing from Pinzón's wild for more than a century.
Yes, giant tortoises are hatching and surviving in the wild on Pinzón Island again. In December 2014, rangers and scientists found the first wild-born Pinzón tortoise hatchlings known to have survived in over 100 years. The turning point was the removal of invasive black rats in 2012, which had eaten nearly every egg and newborn tortoise on the island since the 1800s.
The story is often shared with headlines about "baby turtles" or "the first tortoise births in the Galápagos for a century". Both need a small correction. These are giant tortoises, not sea turtles, and the milestone belongs to one island, Pinzón, not to the whole archipelago. Elsewhere in the Galápagos, tortoises on several islands never stopped breeding.
Where Pinzón is and why its tortoises are special
Pinzón, also known by its old English name Duncan Island, sits near the geographic centre of the Galápagos archipelago, about 1,000 km off the coast of Ecuador. It is small, roughly 18 square kilometres, dry and rugged, rising to about 458 metres.
Its tortoises are a distinct lineage, Chelonoidis niger duncanensis (often listed as Chelonoidis duncanensis). They are among the smallest of the Galápagos giants and carry a saddle-backed shell, the raised front edge that lets tortoises on dry islands stretch their necks up to browse on taller vegetation such as cactus pads.
Galápagos tortoises evolved into separate island forms after reaching the archipelago millions of years ago. Researchers recognise roughly fifteen of these lineages, and several have already vanished, including the Pinta tortoise, whose last known member, Lonesome George, died in 2012. Pinzón came close to joining that list.
How rats stopped a whole generation
The decline began with people. In the late 1800s and early 1900s, expeditions and ships' crews removed large numbers of adult tortoises for food and collections. Far more damaging in the long run were the stowaways: black rats that came ashore from sailing ships and spread across the island.
Rats did not need to kill adult tortoises. They simply ate the eggs and the soft, small hatchlings. Because a giant tortoise can live well past 100 years, the adults kept going for decades and the island still looked populated. Underneath, no young animals were being added. Biologists call this a failure of "recruitment", and on Pinzón it lasted for more than a century.
By the time scientists surveyed the island in the 1960s, only around 100 to 200 old adults remained, and essentially all young tortoises had disappeared. Without help, the population would have aged out of existence.
Fifty years of rearing tortoises by hand
The first rescue step came in 1965. Staff collected eggs on Pinzón and carried them to Santa Cruz Island, where they were incubated and the young raised in pens. This was the start of what became the Galápagos tortoise rearing centre, a model later used for other endangered island populations.
Young tortoises were kept until they were big enough that rats could no longer harm them, usually several years. The first 20 juveniles went back to Pinzón in 1970. By the end of 2017, according to the Galápagos Conservancy, 1,007 head-started tortoises had been returned, and survival among those released between 1970 and 1990 was above 75 per cent.
This kept the population alive, but it had a limit. As long as rats remained, every new generation depended on people collecting eggs. The island itself still could not raise its own young.
The 2012 rat eradication
To fix the cause rather than the symptom, the Galápagos National Park Directorate and partners including Island Conservation planned an island-wide rat eradication. Poison bait was spread from helicopters so that it reached every corner of the rough terrain, after years of trials and preparation. Native Galápagos hawks, which could have been poisoned by eating rats, were captured and held in safety during the campaign, then released.
The operation was completed in December 2012, and after a year of monitoring the island was declared free of rats. Two years later, in December 2014, a team found tiny wild-born tortoises on Pinzón. James Gibbs, a conservation biologist at the State University of New York College of Environmental Science and Forestry who has long worked on Galápagos tortoises, credited the incredible eradication of rats on this island
for giving the animals the chance to breed successfully.
What the "500 baby tortoises" figure really means
Many retellings claim that more than 500 baby tortoises were suddenly found thriving on Pinzón. That number blends two different things. The island's total population is roughly 500 animals: the Galápagos Conservancy describes about 100 original adults plus an estimated 400 repatriated tortoises between 5 and 40 years old, and Wikipedia cites around 532 known individuals. Most of those were raised in captivity and returned, not hatched wild after 2012.
The wild hatchlings found in 2014 were few in number. Their importance was not their count but what they proved: eggs laid on Pinzón could now survive to hatching and beyond without human help. That is the moment a conservation project shifts from life support to genuine recovery.
A second common error is the date. The discovery was reported in 2014 and 2015; the story went viral again in 2020, which led many readers to think it was new.
Why one small island matters
Pinzón is a clear example of a pattern seen worldwide. Invasive predators on islands, especially rats, cats and goats, are among the leading causes of animal extinctions. Island species often evolved without such predators and have no defences against them. Removing the invader can let the native ecosystem restart, sometimes with surprising speed.
The project also shows how long conservation takes. Egg collecting began in 1965, the rats were cleared in 2012 and the first wild hatchlings appeared in 2014. Nearly half a century passed between the first rescue and the first natural success. Because tortoises reach maturity slowly, the full recovery will be measured in decades more.
There are practical lessons for anyone who visits fragile islands, whether in the Galápagos or elsewhere:
- Follow biosecurity rules. Check bags, shoes and boats for seeds, insects and stowaway animals.
- Never carry plants, soil or animals between islands, even short distances.
- Support groups that fund long-term monitoring, since recoveries like this one depend on years of patient fieldwork.
Galápagos tortoise myths worth clearing up
"They are turtles"
All tortoises are turtles in the broad sense, but Galápagos giants are land animals that cannot swim far and would drown in the open sea. Calling them baby turtles suggests sea turtles on a beach, which is a different story entirely.
"They were saved by one dramatic action"
The rat eradication was the decisive step, but it worked only because decades of captive rearing had kept enough tortoises alive to breed. Neither effort alone would have been enough.
"The job is done"
Islands must stay rat-free, which means constant checks for new arrivals. Climate, vegetation and the slow pace of tortoise life all mean the population will need monitoring for many years.
Even so, Pinzón is one of the most encouraging chapters in Galápagos conservation: a small island where young giant tortoises can once again hatch, grow and wander on their own.
Sources: Galápagos Conservancy: Project Pinzón; Wikipedia: Pinzón Island; Wikipedia: Pinzón Island giant tortoise; James Gibbs quoted by The Dodo.
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