Which island is home to the world’s largest concentration of Galápagos giant tortoises?

Isabela Island is home to the world’s largest concentration of Galápagos giant tortoises.

Isabela is the largest island in the Galápagos archipelago and was formed by the joining of six major shield volcanoes. Its tortoise populations are divided into distinct geographic groups, many associated with separate volcanoes and habitats. This isolation helped produce multiple recognized forms and subspecies.

The island’s varied environments include lava fields, humid highlands, mangroves, beaches, and coastal wetlands. The southern side contains the Wall of Tears, a historical site built by prisoners during Ecuador’s former penal-colony era.

“Galápagos giant tortoise” refers to several island-associated populations rather than one completely uniform population. Conservation programs protect nesting areas, control invasive species, and support captive breeding for vulnerable groups.