Pete Oxford / Galapagos Giant Tortoise (Chelonoidis nigra) young being injected with PIT tag, Wolf Volcano, Isabella Island, Galapagos Islands, Ecuador

Pete Oxford / Galapagos Land Iguana (Conolophus subcristatus) juvenile has pit tag checked and will be released, individual came from captive breeding program, Baltra Island, Galapagos Islands, Ecuador

Pete Oxford / Reading PIT tag of Waved albatross (Phoebastria irrorata) Punta Suarez, Española / Hood Island, Galapagos Islands

Doug Perrine / Scientist uses microwave scanner to read PIT tag in Kemp's ridley turtle {Lepidochelys kempii} female laying eggs in nest on beach, Rancho Nuevo, Gulf of Mexico, Mexico 2002