From - Earth Unreal, Edited by Vinuri Randula Silva, This is how long the neck of some subspecies of the Galápagos tortoise can be! The Galápagos tortoise or Galápagos giant tortoise (Chelonoidis niger ) is a species of very large tortoise in the genus Chelonoidis, native to seven of the Galápagos Islands. It is the largest living species of tortoise, with some modern tortoises having a weight of up to 417 kg (919 lb). The Galápagos tortoise is one of the longest-lived vertebrates, with a lifespan of over 100 years in the wild and up to 177 years in captivity. Their shell size and shape vary between subspecies and populations. Tortoises residing on islands with humid highlands are larger, and have domed shells and short necks, while those inhabiting islands with dry lowlands, are smaller, with "saddleback" shells and long necks.