American Museum of Natural History, Galápagos Giant Tortoise webpage Galapagos Tortoise Movement Ecology Programme 'Extinct' Galapagos tortoise may still exist
American Museum of Natural History, páxina web sobre a tartaruga xigante das Galápagos Galapagos Tortoise Movement Ecology Programme A tartaruga "extinta" dos Galápagos pode aínda existir