Galápagos Giant Tortoises, Santa Cruz Highlands, Galápagos Islands, EcuadorWith an average lifespan of 150 years, Galápagos giant tortoises are the oldest reptiles on planet earth. And they really are giants — full grown adults can exceed 550 pounds. They also happen to be endangered and have become a flagship species for conservation efforts in their isolated home range. It was a great experience to be in their presence in the highlands of Santa Cruz Island in the Galápagos. Nikon D800 with Nikkor 17-35mm lens (at 22mm) ISO 400, f/7.1 at 1/1000th of a second.