Pete Oxford / Galapagos Giant Tortoise (Geochelone elephantophus / Chelonoidis nigra) head portrait, Charles Darwin Research Station. Puerto Ayora,Santa Cruz Island, Galapagos, endemic

Pete Oxford / Small Ground Finch (Geospiza fuliginosa) being ringed for Avian pox research, Puerto Ayora, Santa Cruz Island, Galapagos, endemic

Pete Oxford / Finch specimens at the Charles Darwin Research Station, Puerto Ayora, Santa Cruz Island, Galapagos Islands, L to R Top: Large Ground Finch (Geospiza magnirostris), Woodpecker Finch (Cactospiza pallidu...

Pete Oxford / Finch specimens (Emberizidae) at the Charles Darwin Research Station, Puerto Ayora, Santa Cruz Island, Galapagos Islands

Kevin Schafer / Darwin's Fox (Pseudalopex fulvipes) portrait, in temperate rainforest, Chiloe Island, Chile, November, Critically Endangered

Kevin Schafer / Darwin's fox (Pseudalopex fulvipes) wild, Chiloe Island, Chile, Critically endangered species, November

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

Kevin Schafer / Darwin's Zorro (Lycalopex fulvipes) a critically endangered fox, Chiloe Island, Chile

Mark Moffett / Large Ground Finch (Geospiza magnirostris) endemic species, extra large bill for cracking large seeds, largest of Darwin's 13 Finches, Santiago Island, Galapagos Islands, Ecuador

Tui De Roy / Pinta Island Galapagos Tortoise (Chelonoidis nigra abingdoni), Lonesome George, the last survivor of his race, Darwin Reserve Station, Santa Cruz Island, Galapagos Islands, Ecuador

Tui De Roy / Red-footed booby (Sula sula) nesting in mangrove thicket. Darwin Bay, Genovesa (Tower) Island, Galapagos, Ecuador, June.

Tui De Roy / Red-footed booby (Sula sula) incubating single egg with webbed feet. Darwin Bay, Genovesa (Tower) Island, Galapagos, Ecuador, June.

Tui De Roy / Red-footed booby (Sula sula) gathering nesting material. Darwin Bay, Genovesa (Tower) Island, Galapagos, Ecuador, June.

John Abbott / Medium ground finch (Geospiza fortis) male on rock, Charles Darwin Research Station, Santa Cruz Island, Galapagos

John Abbott / Medium ground finch (Geospiza fortis) female on rock, Charles Darwin Research Station, Santa Cruz Island, Galapagos

Pete Oxford / School children watching a Puppet Show explaining environmental issues, presented by members of the Charles Darwin Research Station, Public Relations Department, Puerto Ayora, Santa Cruz Island, Galap...

Staffan Widstrand / Medium Tree Finch (Camarhynchus pauper) perched; one of Darwin's Finches. Critically endangered. Isabela Island, Galapagos, Ecuador, April 2010.

Pete Oxford / Vegetarian finch (Camarhynchus crassirostris) perched, Highlands of Santa Cruz Island, Galapagos Islands

Pete Oxford / Galapagos Giant Tortoise (Geochelone elephantophus / Chelonoidis nigra) Charles Darwin Research Station. Puerto Ayora,Santa Cruz Island, Galapagos, endemic

Pete Oxford / Vegetarian finch (CAMARHYNCHUS CRASSIROSTRIS) perched, Highlands of Santa Cruz Island, Galapagos Islands

Pete Oxford / Large Ground Finch (Geospiza magnirostris) perched, eating seed, Highlands of Santa Cruz Island, Galapagos

Pete Oxford / Galapagos Giant Tortoise (Geochelone elephantophus / Chelonoidis nigra) head portrait, Charles Darwin Research Station. Puerto Ayora,Santa Cruz Island, Galapagos, endemic

Pete Oxford / Close up of the foot pad of a Galapagos Giant Tortoise (Geochelone elephantophus / Chelonoidis nigra) Charles Darwin Research Station. Puerto Ayora,Santa Cruz Island, Galapagos, endemic

Pete Oxford / Scientists from the Charles Darwin Research Station record, ring and take biological samples from wild Galapagos Hawk (Buteo galapagoensis) Espanola Island, Galapagos Islands, Vulnerable species,endem...

Pete Oxford / Small Ground Finch (Geospiza fuliginosa) being measured for Avian pox research, Puerto Ayora, Santa Cruz Island, Galapagos, endemic

Pete Oxford / Medium Ground Finch (Geospiza fortis) held in hand, ringed for Avian pox research, Puerto Ayora, Santa Cruz Island, Galapagos, Endemic

Pete Oxford / Medium Ground Finch (Geospiza fortis) held in hand, Avian pox research, Puerto Ayora, Santa Cruz Island, Galapagos, Endemic

Pete Oxford / Medium Ground Finch (Geospiza fortis) perched, Puerto Ayora, Santa Cruz Island, Galapagos, endemic

Pete Oxford / Finch specimens (Emberizidae) at the Charles Darwin Research Station, Puerto Ayora, Santa Cruz Island, Galapagos Islands

Pete Oxford / Finch specimens (Emberizidae) at the Charles Darwin Research Station, Puerto Ayora, Santa Cruz Island, Galapagos Islands

Pete Oxford / Cactus Ground Finch (Geospiza scandens) perched, Puerto Ayora, Santa Cruz Island, Galapagos,

Pete Oxford / Moth collection held by the Entomology Department at the Charles Darwin Research Station, Puerto Ayora, Santa Cruz Island, Galapagos

Pete Oxford / Medium Ground Finch (Geospiza fortis) perched, Puerto Ayora, Santa Cruz Island, Galapagos, Endemic

Pete Oxford / Galapagos Giant Tortoise, Saddleback form (Geochelone elephantophus hoodensis / Chelonoidis nigra hoodensis) Charles Darwin Research Station, Puerto Ayora, Santa Cruz Island, Galapagos

Pete Oxford / Galapagos Giant Tortoise, Saddleback form (Geochelone elephantophus hoodensis / Chelonoidis nigra hoodensis) Charles Darwin Research Station, Puerto Ayora, Santa Cruz Island, Galapagos

Kevin Schafer / Darwin's Fox (Pseudalopex fulvipes) portrait amongst Chilean Rhubarb / Nalca (Gunnera tinctoria) in temperate rainforest, Chiloe Island, Chile, November, Critically Endangered

Kevin Schafer / Darwin's Fox (Pseudalopex fulvipes) portrait amongst ferns in temperate rainforest, Chiloe Island, Chile, November, Critically Endangered

Kevin Schafer / Darwin's Fox (Pseudalopex fulvipes) portrait standing in temperate rainforest, Chiloe Island, Chile, November, Critically Endangered

Kevin Schafer / Darwin's Fox (Pseudalopex fulvipes) portrait running in temperate rainforest, Chiloe Island, Chile, November, Critically Endangered

Kevin Schafer / Darwin's Fox (Pseudalopex fulvipes) portrait amongst Chilean Rhubarb / Nalca (Gunnera tinctoria) leaves, in temperate rainforest, Chiloe Island, Chile, November, Critically Endangered

Kevin Schafer / Darwin's Fox (Pseudalopex fulvipes) portrait sitting in temperate rainforest, Chiloe Island, Chile, November, Critically Endangered

Kevin Schafer / Darwin's Fox (Pseudalopex fulvipes) portrait sitting in temperate rainforest, Chiloe Island, Chile, November, Critically Endangered

Kevin Schafer / Darwin's Fox (Pseudalopex fulvipes) wild, Chiloe Island, Chile, Endangered

Kevin Schafer / Darwin's fox (Pseudalopex fulvipes) wild, Chiloe Island, Chile, Critically endangered species, November

Pete Oxford / Darwin's Cotton (Gossypium darwinii) flowering, Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Galapagos Giant Tortoise (Chelonoidis nigra), Charles Darwin Research Station, Puerto Ayora, Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Galapagos Giant Tortoise (Chelonoidis nigra), Charles Darwin Research Station, Puerto Ayora, Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Darwin's Cotton (Gossypium darwinii) flower, Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Pinzon Island Tortoise (Chelonoidis nigra ephippium) hatchling emerging from egg, Charles Darwin Research Station, Puerto Ayora, Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Pinzon Island Tortoise (Chelonoidis nigra ephippium) hatchling emerging from egg, Charles Darwin Research Station, Puerto Ayora, Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Pinzon Island Tortoise (Chelonoidis nigra ephippium) hatchling emerging from egg, Charles Darwin Research Station, Puerto Ayora, Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Pinzon Island Tortoise (Chelonoidis nigra ephippium) hatchling emerging from egg, Charles Darwin Research Station, Puerto Ayora, Santa Cruz Island, Galapagos Islands, Ecuador

Tui De Roy / Pinta Island Galapagos Tortoise (Chelonoidis nigra abingdoni) named Lonesome George is the last individual of his subspecies, Charles Darwin Research Center, Pinta Island, Galapagos Islands, Ecuador

Tui De Roy / Pinta Island Galapagos Tortoise (Chelonoidis nigra abingdoni) named Lonesome George is the last individual of his subspecies, browsing on cactus, Charles Darwin Research Station, Pinta Island, Galapag...

Tui De Roy / Pinta Island Galapagos Tortoise (Chelonoidis nigra abingdoni) named Lonesome George is the last individual of his subspecies, Charles Darwin Research Center, Pinta Island, Galapagos Islands, Ecuador

Tui De Roy / Pinta Island Galapagos Tortoise (Chelonoidis nigra abingdoni) named Lonesome George is the last individual of his subspecies, with attendant, Charles Darwin Research Center, Pinta Island, Galapagos Is...

Tui De Roy / Pinta Island Galapagos Tortoise (Chelonoidis nigra abingdoni) named Lonesome George is the last individual of his subspecies, Charles Darwin Research Station, Pinta Island, Galapagos Islands, Ecuador

Tui De Roy / Pinta Island Galapagos Tortoise (Chelonoidis nigra abingdoni) named Lonesome George is the last individual of his subspecies, Charles Darwin Research Station, Pinta Island, Galapagos Islands, Ecuador

Tui De Roy / Galapagos Giant Tortoise (Chelonoidis nigra) undergoing surgery to sterilize hybrids accidentally produced in captive breeding program to repopulate Pinta Island to restore its ecological balance, Cha...

Pete Oxford / Spotted eagle ray (Aetobatus narinari) off Darwin Island, Galapagos

Pete Oxford / Giant tortoise (Geochelone elephantopus abingdoni) 'Lonesome George' the last of the Pinta Island tortoise subspecies (Geochelone nigra abingdoni) stretching neck to get leaves, captive, Charles Darwi...

Pete Oxford / Spotted eagle ray (Aetobatus narinari) off Darwin Island, Galapagos Archepelago

Pete Oxford / Giant tortoise (Geochelone elephantopus abingdoni) 'Lonesome George' the last of the Pinta Island tortoise subspecies (Geochelone nigra abingdoni), captive, Charles Darwin Station, Santa Cruz island,...

Pete Oxford / Spotted eagle ray (Aetobatus narinari) off Darwin Island, Galapagos

Pete Oxford / Giant tortoise (Geochelone elephantopus abingdoni) 'Lonesome George' the last of the Pinta Island tortoise subspecies (Geochelone nigra abingdoni) with Fausto Llerena the National Park Guard who broug...

Pete Oxford / Darwin Arch off of Darwin Island, Galapagos Islands, Ecuador, South America

Pete Oxford / Giant Tortoise (Geochelone elephantopus abingdoni) 'Lonesome George' the last of the Pinta Island Tortoise subspecies (Geochelone nigra abingdoni), captive, Charles Darwin Station, Santa Cruz island...

Pete Oxford / Giant Tortoise (Geochelone elephantopus abingdoni) 'Lonesome George' the last of the Pinta Island Tortoise subspecies (Geochelone nigra abingdoni) feeding, captive, Charles Darwin Station, Santa Cru...

Pete Oxford / Nursery of Endemic / Native Galapagos Plants for sale at a subsidized rate to encourage use of native species rather than introduced ornamental plant for local gardens. CDRS (Charles Darwin Research S...

Pete Oxford / Darwin / Culpepper Island, Galapagos Islands, Ecuador, South America

Pete Oxford / Darwin Volcano Lava Flow, Isabela Island, Galapagos Islands, Ecuador, South America, November 2008

Pete Oxford / Giant Tortoise (Geochelone elephantopus abingdoni) 'Lonesome George' the last of the Pinta Island Tortoise subspecies (Geochelone nigra abingdoni), captive, Charles Darwin Station, Santa Cruz island...

Pete Oxford / Giant Tortoise (Geochelone elephantopus abingdoni) 'Lonesome George' the last of the Pinta Island Tortoise subspecies (Geochelone nigra abingdoni), captive, Charles Darwin Station, Santa Cruz island...

Pete Oxford / Giant Tortoise (Geochelone elephantopus abingdoni) 'Lonesome George' the last of the Pinta Island Tortoise subspecies (Geochelone nigra abingdoni), captive, Charles Darwin Station, Santa Cruz island...

Pete Oxford / Spotted Eagle Ray (Aetobatus narinari) off Darwin Island, North Galapagos Archepelago, Ecuador, South America

Pete Oxford / Darwin Arch off of Darwin Island, Galapagos Islands, Ecuador, South America

Pete Oxford / Eroded volcanic tufa arch known as Darwin Arch, Darwin Island, Galapagos Islands, Ecuador

Pete Oxford / Pinta Island Galapagos Tortoise (Chelonoidis nigra abingdoni), Lonesome George, the last survivor of his race, Darwin Reserve Station, Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Saddleback Galapagos Tortoise (Chelonoidis nigra hoodensis) babies in rearing center of Darwin Reserve Station, Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Pinta Island Galapagos Tortoise (Chelonoidis nigra abingdoni), Lonesome George, the last survivor of his race, Darwin Reserve Station, Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Pinta Island Galapagos Tortoise (Chelonoidis nigra abingdoni), Lonesome George, the last survivor of his race, Darwin Reserve Station, Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Pinta Island Galapagos Tortoise (Chelonoidis nigra abingdoni), Lonesome George, the last survivor of his race, Darwin Reserve Station, Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Spotted Eagle Ray (Aetobatus narinari), Darwin Island, Galapagos Islands, Ecuador

Tim Laman / Galapagos giant tortoises (Geochelone nigra / Geochelone elephantopus) in captivity at the Charles Darwin Research Station, with tourists. Santa Cruz Island, Galapagos Islands.

Tim Laman / Galapagos giant tortoise (Geochelone nigra hoodensis), Espanola (Hood) Island race. A male named 'Diego' at the captive breeding center at the Charles Darwin Research Station. He fathered offspring us...

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

Tim Laman / Galapagos giant tortoise (Geochelone nigra abingdoni) from Pinta island named "Lonesome George" (captive). He is the only remaining member of his race. Charles Darwin Research Station, Santa Cruz Isla...

Tim Laman / Galapagos land iguana (Conolophus subcristatus) at Charles Darwin Research Station (captive). Santa Cruz Island, Galapagos Islands.

Tim Laman / Young Galapagos giant tortoises (Geochelone nigra / Geochelone elephantopus) at the captive breeding facility at the Charles Darwin Research Station, Santa Cruz Island, Galapagos Islands.

Kevin Schafer / Darwin's Zorro (Lycalopex fulvipes) a critically endangered fox, Chiloe Island, Chile

Kevin Schafer / Darwin's Zorro (Lycalopex fulvipes) a critically endangered fox, Chiloe Island, Chile

Doug Perrine / Darwin / Culpepper Island viewed from the sea, Galapagos

Tim Laman / Small Ground Finch (Geospiza fuliginosa), one of Darwin's Finches, on lava rocks on the beach of Espanola / Hood Island, Galapagos.

Jack Dykinga / Land Iguana (Conolophus subcristatus) shedding its skin at the Charles Darwin Research Station's breeding centre on Santa Cruz Island, Galapagos

Pete Oxford / Aerial view of Palo santo trees (Bursera galapageia) growing in the arid zone of Tagus Cove, Isabela Island around the circular crater of Darwin's Lake, Galapagos

Luciano Candisani / Tuff arch just offshore Darwin Island, Galapagos Islands, Ecuador