Juan Carlos Munoz / Galapagos giant tortoise {Geochelone elephantopus} head portrait, Santa Cruz Island, Galpagos, January

Pete Oxford / Galapagos Giant Tortoise (Geochelone elephantophus vandenburghi) near fumaroles, Alcedo Volcano crater floor, Isabela Island, Galapagos Islands

Pete Oxford / Volcan Alcedo Giant Tortoise (Chelonoidis nigra vandenburghi), Alcedo Volcano crater floor, Isabella Island, Galapagos Islands, Ecuador

Tim Laman / Galapagos giant tortoise (Geochelone nigra / Geochelone elephantopus) feeding (captive). Charles Darwin Research Station, Santa Cruz Island, Galapagos Islands.

MORLEY READ / "Lonesome George", the last Galapagos Tortoise {Geochelone elephantopus} from Pinta Island, Galapagos

Pete Oxford / Giant tortoise {Geochelone elephantopus}, Alcedo Volcano, Isabela Island, Galapagos

Pete Oxford / Giant Tortoise (Geochelone elephantopus) and tourists in the Galapagos Islands

Mark Moffett / Galapagos Giant Tortoise (Chelonoidis nigra) in Alcedo Volcano, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / Galapagos Giant Tortoise (Chelonoidis nigra) on caldera rim, Alcedo Volcano, Isabella Island, Galapagos Islands, Ecuador

Michio Hoshino / Galapagos Giant Tortoise (Chelonoidis nigra) pair communicating, Galapagos Islands, Ecuador

Tui De Roy / Galapagos Giant Tortoise (Chelonoidis nigra) on caldera rim, Alcedo Volcano, Isabella Island, Galapagos Islands, Ecuador

Tui De Roy / Galapagos Giant Tortoise (Chelonoidis nigra) yawning, Alcedo Volcano, Isabella Island, Galapagos Islands, Ecuador