# Galápagos Tortoise — Facts, Threats & Conservation

*Chelonoidis niger species complex (Quoy & Gaimard, 1824) — 12 surviving species*

> The Galápagos tortoise is the world's largest tortoise, reaching over 400 kg and living beyond 100 years; hunted from an estimated 200,000 animals down to about 3,000 by the 1970s, captive breeding and invasive-species removal have since recovered the population to around 60,000.

**IUCN status:** Vulnerable — recovered from ~3,000 animals to around 60,000  ·  **WARN range:** Galápagos Islands, Ecuador

## Quick facts
| Fact | Value |
| --- | --- |
| Maximum weight | 417 kg — the largest living tortoise |
| Lifespan | Over 100 years; credible records beyond 150 |
| Survival without food or water | Many months |
| Population, 1970s | Around 3,000 |
| Population today | Around 60,000 |
| Species lost | Pinta Island (2012) and Floreana |

## Scientific classification
- **Kingdom:** Animalia
- **Phylum:** Chordata
- **Class:** Reptilia
- **Order:** Testudines
- **Family:** Testudinidae
- **Genus:** Chelonoidis
- **Species:** Chelonoidis niger complex — 12 surviving species

## Conservation status
- **Status:** Vulnerable — individual species range from Vulnerable to Critically Endangered
- **Population:** Around 60,000 across all surviving species
- **Trend:** Increasing
- **Assessed:** 2016 and later, varying by species
- **CITES:** Appendix I
- One of the strongest recovery records in conservation. Captive breeding, eradication of goats and rats, and repatriation of reared juveniles lifted the population roughly twentyfold from its 1970s low.

## Key facts: Galápagos Tortoise
- The Galápagos tortoise is the largest living tortoise, with the heaviest recorded individual at 417 kg.
- It is one of the longest-lived vertebrates, routinely passing 100 years and with credible records beyond 150.
- Whalers and sealers took an estimated 200,000 tortoises, storing them alive in ships' holds because they survive months without food or water.
- Shell shape tracks island vegetation: domed shells on wet islands with ground plants, saddleback shells on dry islands where tortoises must reach up for cactus pads.
- Lonesome George, the last Pinta Island tortoise, died in 2012 — the extinction of an entire species, in public, in the twenty-first century.
- Diego, an Española tortoise repatriated from San Diego Zoo, fathered an estimated 800 offspring and was returned to the wild in 2020 after his species' recovery.
- The population has risen from around 3,000 in the 1970s to roughly 60,000 through captive breeding, goat and rat eradication, and repatriation of juveniles.

## How they were nearly wiped out
Galápagos tortoises can survive for many months without food or water, metabolising fat reserves and the water stored in their bodies. For eighteenth and nineteenth-century whaling and sealing crews, that made them a perfect provision: living meat that needed no feeding and stayed fresh indefinitely. Ships stacked them in their holds by the dozen.

An estimated 200,000 tortoises were taken. Crews preferentially took females, which are smaller and were found lower on the islands, which skewed the surviving populations badly. Settlers then introduced goats, which stripped the vegetation tortoises fed on, and rats and pigs, which ate eggs and hatchlings. Some islands lost their tortoises entirely. By the time serious conservation began in the 1960s, several populations were down to a few dozen animals.

## The recovery, and what made it work
Three things were done, and all three were necessary. Captive breeding centres, most importantly the Fausto Llerena centre on Santa Cruz, incubated eggs and reared juveniles past the age at which rats kill them. Invasive species were removed — the eradication of around 79,000 goats from Isabela and Santiago was one of the largest island restoration operations ever attempted. And juveniles were repatriated to their island of origin once big enough to survive.

The Española population is the clearest result. It was reduced to 14 animals — 12 females and two males, too widely scattered to find each other. A third male, Diego, was located at San Diego Zoo and repatriated. From those 15 animals, the captive programme produced over 2,000 tortoises, and Española now has a self-sustaining wild population. Diego, credited with an estimated 800 offspring, was returned to the island in 2020.

## Why the shells are different shapes
Galápagos tortoise shells come in two broad forms, and the difference is about food. On larger, wetter, higher islands where vegetation grows at ground level, tortoises have domed shells and short necks — there is no need to reach upward, and a domed shell offers more protection.

On drier, lower islands, the available food is largely prickly pear cactus growing well above the ground. Tortoises there have saddleback shells, raised sharply at the front, plus longer necks and legs, allowing them to stretch upward for cactus pads. Darwin noted during the Beagle voyage that the vice-governor claimed to identify a tortoise's island from its shell, and that observation fed into his thinking about how isolated populations diverge. The tortoises are one of the reasons the Galápagos matter to biology at all.

## Lonesome George and what he represented
George was found on Pinta Island in 1971, by which point the island's tortoises had been assumed extinct for decades — goats had stripped the vegetation, and no others were ever found. He was moved to the Santa Cruz breeding centre and became the most famous tortoise in the world, with an international search for a mate that ran for forty years. Females of closely related species were paired with him; no viable offspring resulted.

He died on 24 June 2012, and Chelonoidis abingdonii went extinct with him. What makes George significant is that this happened in full public view, with resources, expertise and global attention available, and it still could not be reversed. He had been the last of his species since before he was found. The lesson conservationists draw from him is the one that runs through every extinction: by the time a species is down to one individual, the outcome was decided decades earlier.

## What WARN does
WARN publishes free, sourced species education, including the cases where conservation has demonstrably worked. The Galápagos tortoise recovery — from around 3,000 animals to 60,000 — is one of the strongest available arguments that funded intervention changes outcomes, and it deserves to be as widely known as the losses.

If this guide helps you understand wildlife and the pressures it faces, a gift to WARN supports habitat protection and free public education in our partner countries.

## Frequently asked questions: Galápagos Tortoise
### How long do Galápagos tortoises live?
Routinely over 100 years, with credible records beyond 150. Harriet, a tortoise held in Australia, was around 175 when she died in 2006. They are among the longest-lived vertebrates known.

### How big do Galápagos tortoises get?
The largest recorded individual weighed 417 kg, and large males commonly exceed 250 kg with shells over 1.5 m long. They are the largest living tortoise species.

### Why were Galápagos tortoises hunted?
As ships' provisions. They survive many months without food or water, so whaling and sealing crews stacked them alive in holds as a supply of fresh meat. An estimated 200,000 were taken during the eighteenth and nineteenth centuries.

### Who was Lonesome George?
The last known Pinta Island tortoise, found in 1971 and cared for at the Santa Cruz breeding centre until his death on 24 June 2012. His species, Chelonoidis abingdonii, went extinct with him despite a forty-year international effort to find him a mate.

### Are Galápagos tortoises still endangered?
They remain threatened, but the trend is strongly positive. The total population has risen from around 3,000 in the 1970s to roughly 60,000 through captive breeding, invasive-species eradication and repatriation. Individual species range from Vulnerable to Critically Endangered.

### Why do some have saddle-shaped shells?
To reach food. On dry islands where the main food is prickly pear cactus growing above ground level, tortoises evolved shells raised at the front plus longer necks and legs. On wetter islands with ground vegetation, shells are domed and necks shorter.

### What do Galápagos tortoises eat?
Galápagos tortoises are herbivores eating grasses, leaves, cactus pads, fruits and other vegetation. On drier islands with saddleback shells, tortoises stretch long necks upward to reach prickly pear cactus growing above ground level; on wetter islands domed shells and shorter necks suffice for ground-level plants. Adults can survive many months without food or water — a trait that made them targets as living ship provisions. An estimated 200,000 were taken before conservation began.

### Where do Galápagos tortoises live?
Galápagos tortoises live only on the Galápagos Islands of Ecuador, in habitats from humid highlands to dry lowland scrub. Shell shape tracks island ecology: domed forms on wetter islands with ground vegetation, saddleback forms on drier islands where food grows higher. The population recovered from around 3,000 in the 1970s to roughly 60,000 through captive breeding, invasive-species removal and repatriation, though individual species remain threatened.

### Are Galápagos tortoises dangerous?
Galápagos tortoises are not dangerous to people. These slow-moving giants reach over 400 kg — the heaviest recorded individual weighed 417 kg — and routinely live beyond 100 years. They retreat into their shells when disturbed rather than attacking. Whalers once stacked them alive in ships' holds as provisions because they survive months without food or water. Today they remain threatened but the overall population trend is strongly positive.

## Sources
- [IUCN Red List — Chelonoidis niger](https://www.iucnredlist.org/species/9017/12253473)
- [Galápagos Conservancy — Giant Tortoise Restoration Initiative](https://www.galapagos.org/conservation/restoring-tortoise-populations/)
- [CITES Appendices](https://cites.org/eng/app/appendices.php)

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Full guide: https://worldanimalrescuenetwork.org/wildlife-guides/galapagos-tortoise