Galápagos giants can outlive a century—and once numbered a quarter million
Chelonoidis niger, the Galápagos tortoise, is the largest living tortoise, reaching about 417 kilograms, and among the longest-lived vertebrates. Wild spans exceed one hundred years; captives have reached 177, with Harriet living at least 175. Fifteen subspecies are recognized, twelve still extant.
Native to seven islands, shell shape tracks habitat: humid highland animals grow large with domed shells and short necks, while dry lowland forms stay smaller with saddleback shells and long necks—differences Charles Darwin noted on the Beagle's 1835 visit. Spanish explorers in the sixteenth century named the islands for galápago, tortoise; maps of Mercator and Ortelius around 1570 still said Islands of the Tortoises. Numbers crashed from over 250,000 then to about 15,000 by the 1970s through meat and oil harvests, farms, and invasive rats, goats, and pigs.
Lonesome George, last known Pinta Island abingdonii, died in captivity on 24 June 2012 after failed cross-subspecies breeding. Floreana's type subspecies and a Santa Fe form vanished in the mid-to-late nineteenth century, though Isabela DNA hints Floreana ancestry survives in mixed animals; a live Fernandina female in 2019 revived the disputed phantastica line. Captive breeding has released thousands of juveniles, lifting totals past an estimated 19,000 by the early twenty-first century, yet IUCN still lists every survivor as Threatened.
Only Aldabra's giants share their modern island-radiation status; Mascarene Cylindraspis was gone by the nineteenth century. Taxonomy wandered from Testudo indica through Geochelone to masculine Chelonoidis after 2017 spelling fixes. A 2021 divergence study again treated the races as subspecies of one species, followed by major turtle databases—while museums keep measuring how sailors rewrote an archipelago of shells.
Source: Galápagos tortoise
