John Cancalosi / Axolotl / Mexican salamander (Ambystoma mexicanum), white or leucistic form, critically endangered in the wild, captive, native to Mexico

Anup Shah / Celebes / Black crested macaque (Macaca nigra) sub-adult male yawning, Tangkoko National Park, Sulawesi, Indonesia.

Ann & Steve Toon / Black rhinoceros (Diceros bicornis) on savanna, Lewa Wildlife Conservancy, Laikipia, Kenya

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) sub-adult male head portrait, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) mature male head and shoulders portrait, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) sub-adult male head portrait, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) baby less than 1 month old in mothers arms, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) female head and shoulders standing portrait, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) two individuals greeting, Tangkoko National Park, Sulawesi, Indonesia.

Fiona Rogers / Celebes / Black crested macaque (Macaca nigra) female with suckling infant aged 9-12 months, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) juvenile sitting on a tree, wet from playing in the river, wide angle perspective, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) 'Alpha' baby female aged about 1 month hanging upside down in a tree, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) two juveniles approaching with curiosity, one grimacing Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) group up close, watching with curiosity, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) sub-adult male sitting on a beach, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) sub-adult male resting on a fallen tree, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) female sitting in a tree with her baby aged less than 1 month, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) sub-adult male trying to break into bamboo to feed on ant eggs from a nest, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) silhouette of juvenile sitting in a tree at coast, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) sub-adult male head and shoulders portrait, Tangkoko National Park, Sulawesi, Indonesia.

Anup Shah / Celebes / Black crested macaque (Macaca nigra) group watching with curiosity, Tangkoko National Park, Sulawesi, Indonesia

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) silverback feeding, Parc National des Volcans, Rwanda

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) mother holding five month old twin babies, Parc National des Volcans, Rwanda

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) mother holding five month old twin babies, Parc National des Volcans, Rwanda

Mark Carwardine / Sumatran rhino (Dicerorhinus sumatrensis) walking in forest, from low-angle. Captive-Sumatran Rhino Sanctuary, within Way Kambas National Park, Lampung Province, southern Sumatra, Indonesia

Mark Carwardine / Looking down on Sumatran rhino (Dicerorhinus sumatrensis) walking through stream. Captive-Sumatran Rhino Sanctuary, within Way Kambas National Park, Lampung Province, southern Sumatra, Indonesia

Mark Carwardine / Sumatran rhino (Dicerorhinus sumatrensis) browsing on forest vegetation. Captive-Sumatran Rhino Sanctuary, within Way Kambas National Park, Lampung Province, southern Sumatra, Indonesia

Mark Carwardine / Close up of the eye of a Sumatran rhino (Dicerorhinus sumatrensis) Captive-Sumatran Rhino Sanctuary, within Way Kambas National Park, Lampung Province, southern Sumatra, Indonesia

Mark Carwardine / Head portrait of Sumatran rhino (Dicerorhinus sumatrensis) Captive-Sumatran Rhino Sanctuary, within Way Kambas National Park, Lampung Province, southern Sumatra, Indonesia

Mark Carwardine / Sumatran rhino (Dicerorhinus sumatrensis) browsing on forest vegetation. Captive-Sumatran Rhino Sanctuary, within Way Kambas National Park, Lampung Province, southern Sumatra, Indonesia

Mark Carwardine / Close up of Sumatran rhino (Dicerorhinus sumatrensis) browsing on forest vegetation. Captive-Sumatran Rhino Sanctuary, within Way Kambas National Park, Lampung Province, southern Sumatra, Indonesia

Mark Carwardine / Kakapo (Strigops habroptila) wild male known as Sirocco walking along the ground, night parrot, Codfish Island, off Stewart Island, southern New Zealand, Critically endangered species

Mark Carwardine / Kakapo (Strigops habroptila) wild male known as Sirocco, night parrot, Codfish Island, off Stewart Island, southern New Zealand, Critically endangered species

Mark Carwardine / Kakapo (Strigops habroptila) wild male known as Sirocco perched in tree, night parrot, Codfish Island, off Stewart Island, southern New Zealand, Critically endangered species

Mark Carwardine / Kakapo (Strigops habroptila) wild male known as Sirocco, night parrot, Codfish Island, off Stewart Island, southern New Zealand, Critically endangered species

Mark Carwardine / Yangtze / Chinese river dolphin / Baiji {Lipotes vexillifer} Critically endangered - officially declared extinct late 2007. This individual (a male called Qi-Qi) was photographed in captivity in 1988...

Mark Carwardine / Yangtze river dolphin {Lipotes vexillifer} captive, Wuhan, China, crit endangered

Yuri Shibnev / Wild Amur leopard (Panthera pardus orientalis) crossing a fallen tree over a river, Kedrovaya, Pad Reserve, Far East Russia 1987

Christophe Courteau / West African giraffe {Giraffa camelopardis peralta} poached by local people. Sahel, Niger.

Christophe Courteau / West African giraffes {Giraffa camelopardis peralta} in millet plantation Sahel, Niger.

Christophe Courteau / West African giraffe {Giraffe camelopardis peralta} in local village. Sahel, Niger.

Christophe Courteau / West African giraffe {Giraffe camelopardis peralta} skin detail.

Christophe Courteau / Pair of West African giraffes {Giraffe camelopardis peralta}. Male on right, female on left.

Christophe Courteau / West African giraffe male feeding {Giraffa camelopardis peralta}. Sahel, Niger.

Christophe Courteau / West African giraffes {Giraffa camelopardalis peralta}. Dallol Bosso Nord, Sahel, Niger.

Christophe Courteau / West African giraffe calf {Giraffa camelopardalis peralta}, Niger.

Christophe Courteau / West African giraffe face {Giraffa camelopardis peralta}. Sahel, Niger.

XI ZHINONG / Tonkin snub-nosed monkey (Rhinopithecus avunculus) in tree, Vietnam. Critically endangered species.

Vladimir Medvedev / Amur Leopard (Panthera pardus orientalis) on rocky slope at night, Kedrovaya Pad reserve, Primorskiy krai, Far East Russia, December, Critically endangered species.

Vladimir Medvedev / Amur Leopard (Panthera pardus orientalis) profile view, Kedrovaya Pad reserve, Primorskiy krai, Far East Russia. January, Critically endangered species.

Vladimir Medvedev / Amur Leopard (Panthera pardus orientalis) rear view, Kedrovaya Pad reserve, Primorskiy krai, Far East Russia. December, Critically endangered species.

Tui De Roy / Hood island giant tortoise (Chelonoidis nigra hoodensis) used for breeding program since 1960s, Tortoise Breeding Centre, Puerto Ayora, Santa Cruz Island, Galapagos Islands, Ecuador, Critically endang...

Cheryl-Samantha Owen / Rothschild's giraffe (Giraffa camelopardalis rothschildi), Murchison Falls National Park, Uganda, East Africa. Murchison Falls National Park hosts the only remaining naturally occurring population of...

Rod Williams / Northern / Chinese white-cheeked gibbon (Nomascus leucogenys) female head portrait, Laos, Vietnam, critically endangered species. Captive.

Roland Seitre / Western Giant Eland (Tragelaphus / Taurotragus derbianus), the world's largest antelope. Critically endangered. Captive. Fathala Reserve, Toubacouta, Senegal, 2011.

Roland Seitre / Family of Hirola / Hunter's Antelope (Beatragus hunteri) . Critically endangered. Ishaqbini Reserve, Kenya, Africa, 2009.

Roland Seitre / Hirola / Hunter's Antelope (Beatragus hunteri) in profile. Critically endangered. Ishaqbini Reserve, Kenya, Africa, 2009.

Roland Seitre / Iberian / Spanish Lynx (Lynx pardina) cub, 2-3 months, in transport box at the Donana breeding station. Lynx reintroduction program, Andalusia, Spain, June 2007.

Roland Seitre / Program director Dr Astrid Vargas examining Iberian / Spanish Lynx (Lynx pardina) at the Donana breeding station. Andalusia, Spain, June 2007.

Roland Seitre / Mother Iberian / Spanish Lynx (Lynx pardina) with cubs climbing the fence of their enclosure. Donana breeding station, part of the lynx reintroduction project in Andalusia. Spain, June 2006.

Roland Seitre / Spanish / Iberian Lynx (Lynx pardina) cub portrait, part of a breeding and reintroduction program. Captive: critically endangered. Andalusia, Spain, June 2006.

Roland Seitre / Spanish / Iberian Lynx (Lynx pardina) cub playing with its mother; part of a breeding and reintroduction program. Captive: critically endangered. Andalusia, Spain, June 2006.

Roland Seitre / Spanish / Iberian Lynx (Lynx pardina) female with cub, part of a breeding and reintroduction program. Captive: critically endangered. Andalusia, Spain, June 2006.

Roland Seitre / Spanish / Iberian Lynx (Lynx pardina) in profile, part of a breeding and reintroduction program. Captive: critically endangered. Andalusia, Spain, June 2006.

Roland Seitre / Blue throated / Wagler's macaw (Ara glaucogularis) chick in nestbox, Santa Cruz Zoo, Teneriffe, Canary Islands, Critically endangered species from Bolivia

Roland Seitre / Pet Blue throated / Wagler's macaw (Ara glaucogularis) in hut amongst people preparing food, Trinidad, Beni, Bolivia, Critically endangered species, January 2008.

Roland Seitre / Hermit / Northern bald ibis (Geroniticus eremita) breeding project of the Jerez de la Frontera Zoo, Cadiz, Spain. Keeper with juvenile birds on open land, keepers wear ibis helmets to limit human impr...

Roland Seitre / Hermit / Northern bald ibis (Geroniticus eremita) breeding project of the Jerez de la Frontera Zoo, Cadiz, Spain. Keeper with two chicks pecking his face, keepers wear ibis helmets to limit human impr...

Roland Seitre / Spix's Macaw (Cyanopsitta spixii) male and female pair, portrait, captive, critically endangered species, from Brazil

Roland Seitre / Mauricio dos Santos with a captive bred Spix's macaw (Cyanopsitta spixii), critically endangered species, site of the first attempts to breed Spix's macaw after their extinction in the wild, Recife, P...

Roland Seitre / Southern bluefin tuna (Thunnus maccoyii) in fish cage of fish farm, Port Lincoln, South Australia, Critically Endangered species. Wild caught fish are reared in large fish cages for maximum growth bef...

Vladimir Medvedev / Wild female Amur leopard (Panthera pardus orientalis) Kedrovaya Pad reserve, Primorsky Krai, Far East Russia, January. Critically endangered species

Vladimir Medvedev / Wild female Amur leopard (Panthera pardus orientalis) looking up, Kedrovaya Pad reserve, Primorsky Krai, Far East Russia, January. Critically endangered species

Vladimir Medvedev / Wild female Amur leopard (Panthera pardus orientalis) on rocky hillside, Kedrovaya Pad reserve, Primorsky Krai, Far East Russia, January. Critically endangered species

Vladimir Medvedev / Wild female Amur leopard (Panthera pardus orientalis) on rocky hillside, Kedrovaya Pad reserve, Primorsky Krai, Far East Russia, January. Critically endangered species. Commended in Wildlife Photograp...

Vladimir Medvedev / Wild female Amur leopard (Panthera pardus orientalis) on rocky hillside, Kedrovaya Pad reserve, Primorsky Krai, Far East Russia, January. Critically endangered species

Inaki Relanzon / Silky sifaka (Propithecus candidus) adult with juvenile in tree, Marojejy National Park, North Madagascar Critically endangered, November 2010

Inaki Relanzon / Black and white ruffed lemur (Varecia variegata variegata) portrait, Captive, Madagascar, Critically endangered

Edwin Giesbers / European mink (Mustela lutreola) swimming, captive, Germany, Critically endangered

Edwin Giesbers / European mink (Mustela lutreola) on log, Captive, Germany, Critically endangered

Sandesh Kadur / Pygmy Hog (Porcula salvania) foraging. Captive, member of a reintroduction project. Assam, eastern India.

Sandesh Kadur / Pygmy Hog (Porcula salvania) seen through undergrowth. Captive, member of a reintroduction project. Assam, eastern India.

Florian Möllers / European Mink (Mustela lutreola) female on a forest road. Critically endangered. Saarland, Germany, August.

Sandesh Kadur / Greater adjutant storks (Leptoptilos dubius) at a landfill dite near the city of Guwahati, Assam, India, Critically Endangered

Charlie Summers / Christmas Island Frigatebird (Fregata andrewsi) hovering in flight. Christmas Island, Indian Ocean, Australia, December.

Claudio Contreras / Macaya breast-spot landfrog (Eleutherodactylus thorectes), critically endangered, Pic Macaya National Park, Massif de la Hotte, Haiti, October

Claudio Contreras / La Hotte big-legged landfrog (Eleutherodactylus apostates), critically endangered, Haiti, captive

Claudio Contreras / La Hotte landfrog (Eleutherodactylus bakeri), critically endangered, Pic Macaya National Park, Massif de la Hotte, Haiti, October

Inaki Relanzon / White collared / Grey-headed lemur (Eulemur cinereiceps) male, captive, Manombo forest, Madagascar, critically endangered

Inaki Relanzon / Golden bamboo lemur (Hapalemur aureus), Critically endangered, Ranomafana National Park, East Madagascar.

Tim Laman / Waved albatross (Phoebastria irrorata) head portrait, Galapagos, Critically endangered

Tim Laman / Waved Albatross (Phoebastria irrorata) in flight, soaring, Galapagos, Critically endangered

Juan Carlos Munoz / Iberian / Spanish lynx (Lynx pardinus) with its prey, a rabbit. Sierra de Andujar Natural Park, Andalusia, Spain, Feb 2010

Juan Carlos Munoz / Wild Iberian / Spanish lynx (Lynx pardinus) walking through yellow flowers in Sierra de Andujar Natural Park, Jaen, Andalusia, Spain, March 2010

Suzi Eszterhas / Sumatran Orangutan (Pongo abelii) mother and playful baby aged 9 months, North Sumatra, Indonesia. Critically Endangered *Digitally removed highlight in background

Suzi Eszterhas / Long tailed macaque (Macaca fascicularis) trying to take banana from Sumatran Orangutan (Pongo abelii and young baby, North Sumatra, Indonesia. Critically Endangered