Suzi Eszterhas / Chimpanzee (Pan troglodytes) male, western Uganda

Petra Wegner / Tricolour Cavalier King Charles Spaniel lying on floor in corridor

Petra Wegner / Tricolour Cavalier King Charles Spaniel lying on carpet in corridor

Petra Wegner / Cavalier King Charles Spaniel, blenheim, after surgery of the eye, wearing a protective funnel.

Christophe Courteau / Eastern lowland gorilla (Gorilla beringei graueri) young gorilla with arm injured after being caught in a snare, Kahuzi Biega NP, Democratic Republic of Congo. Gorille de plaine de l'Est, Republique...

Lisa Hoffner / Orphaned African Elephant (Loxodonta africana) 'Murka' with spear wound to the head, having a dust bath. David Sheldrick Wildlife Trust Nairobi Elephant Nursery, Kenya, July 2007.

Lisa Hoffner / Orphaned African Elephant (Loxodonta africana) 'Murka' with spear wound to the head. David Sheldrick Wildlife Trust Nairobi Elephant Nursery, Kenya, July 2007.

Bernard Castelein / Grey Seal (Halichoerus grypus) portrait, Helgoland, Germany, May

Lisa Hoffner / Keeper sleeping with recently orphaned Elephant (Loxodonta africana). David Sheldrick Wildlife Trust Nairobi Elephant Nursery, Kenya, April 2007.

Lisa Hoffner / Keeper sleeping next to recently orphaned Elephant (Loxodonta africana). David Sheldrick Wildlife Trust Nairobi Elephant Nursery, Kenya, April 2007.

Lisa Hoffner / Orphan baby Elephant (Loxodonta africana) pressing its trunk against a wooden post, part of an Elephant mother mimic to comfort new orphans. David Sheldrick Wildlife Trust Nairobi Elephant Nursery, Ke...

Lisa Hoffner / Newly orphaned baby Elephant (Loxodonta africana) being monitored by veterinarian in airplane during rescue operation. David Sheldrick Wildlife Trust Nairobi Elephant Nursery, Kenya, April 2007.

Orsolya Haarberg / Musk ox (Ovibus moschatus) in snow storm, standing with rear to the wind, Dovre-Sunndalsfjella National Park, Sor-Trondelag, Norway. December.

Bryan and Cherry Alexander / Emperor penguins (Aptenodytes forsteri), probably non breeders, investigating a dead chick. Snow Hill Island, Antarctica, October.

Bryan and Cherry Alexander / Emperor penguins (Aptenodytes forsteri), probably non breeders, investigating a dead chick. Snow Hill Island, Antarctica, October.

Rod Williams / Red uakari monkey (Cacajao calvus rubicundus), female, Captive, occurs Amazon Basin, Brazil, Peru, South America, Endangered.

Mark Taylor / Tricolour Border Collie puppy lying.

Jane Burton / Sable Border Collie puppy, 9 weeks, sitting.

Jane Burton / Border Collie puppy sitting.

Jane Burton / Yellow Labrador Retriever pup, 8 weeks, lying with paws crossed.

Jane Burton / Yellow Labrador Retriever puppy, with chin on paws.

Jane Burton / Yellow Labrador Retriever puppy with tinsel.

Mark Taylor / Chocolate Labrador puppy head portrait, 3 months.

LYNN M. STONE / Basset Hound male standing wet on a beach. Goleta, California, USA, February.

LYNN M. STONE / Portrait of a Basset Hound male in flowers. Goleta, California, USA, February.

LYNN M. STONE / Portrait of two male Basset Hounds lying in flowers. Goleta, California, USA, February.

LYNN M. STONE / Portrait of a Basset Hound male lying in flowers. Goleta, California, USA, February.

LYNN M. STONE / Portrait of Basset Hound male lying in a patch of flowers. Goleta, California, USA, February.

LYNN M. STONE / Basset Hound male standing in flowers. Goleta, California, USA, February.

LYNN M. STONE / Basset Hound male standing in flowers. Goleta, California, USA, February.

LYNN M. STONE / Pair of male Basset Hounds sitting in flowers. Goleta, California, USA, February.

Edwin Giesbers / Konik Wild Horse (Equus ferus caballus) walking through frosty grass. The Netherlands, November.

Edwin Giesbers / Mute Swan (Cygnus olor) standing on frosty grass as rain approaches. The Netherlands, March.

David Woodfall / Brown bear (Ursus arctos) in captivity in snow after abuse / trauma following spell as a circus or dancing bear. Rehablitation centre established in 2006 for distressed bears. Romania, October 2010

Chien Lee / Orangutan (Pongo pygmaeus) feeding, Semengoh Wildlife Rehabilitation Centre, Sarawak, Borneo, Malaysia

Bryan and Cherry Alexander / School children having light treatment to combat SAD Syndrome in the Polar night. Tromso, North Norway, 1990.

Bryan and Cherry Alexander / Polar bear (Ursus maritimus) mother standing over her mauled cub after it was attacked by large male. Cape Churchill, Manitoba, Canada.

Tui De Roy / Waved Albatross (Phoebastria irrorata) trying in vain to move egg from between rocks, Galapagos Islands, Ecuador

Paul Hobson / Dead Badger (Meles meles) beside road, South Yorkshire, UK

LYNN M. STONE / Domestic dog, Basset Hound, 9-month female, St. Charles, Illinois, USA

Doug Wechsler / Great / Common Cormorant (Phalacrocorax carbo) with fish tackle stuck in throat, Gateway National Recreation Area, Sandy Hook, New Jersey, USA

Dietmar Nill / Willow warbler (Phylloscopus trochilus) dead, Germany

Patricio Robles Gil / Lowland gorilla (Gorilla gorilla) sleeping on platform in front of mural with gorillas drawn on it, captive, Seoul Zoo

Doug Allan / Inuit hunters with body of unborn Beluga (Delphinapterus leucas) calf and mother that they have hunted, Lancaster Sound, Nunavut, Canadian high Arctic, June 2004

Mark Taylor / Elderly Golden Retriever bitch, Missy, 13 years old.

Anup Shah / Gelada baboon (Theropithecus gelada) female carrying her dead foetus, Simien Mountains National Park, Ethiopia, November

Anup Shah / Gelada baboon (Theropithecus gelada) female carrying her dead foetus, Simien Mountains National Park, Ethiopia, November

Anup Shah / Gelada baboon (Theropithecus gelada) female carrying her dead foetus in her mouth, Simien Mountains National Park, Ethiopia, November

Inaki Relanzon / Fish-eye image of Polar bear (Ursus maritimus) resting on tundra, Churchill, Hudson Bay, Manitoba, Canada, October 2005

Inaki Relanzon / Fish-eye image of Polar bear (Ursus maritimus) resting on tundra, Churchill, Hudson Bay, Manitoba, Canada, October 2005

Inaki Relanzon / Fish-eye image of Polar bear (Ursus maritimus) resting on tundra, Churchill, Hudson Bay, Manitoba, Canada, October 2005

Albert Lleal / Brown Bear (Ursus arctos), captive gnawing on bars of cage, Spain

Wild Wonders of Europe / Pitkin / Dusky grouper (Epinephelus marginatus) portrait, Cala di Grecu, Lavezzi Islands, Corsica, France, September 2008

Stephen Belcher / Mountain Gorilla (Gorilla gorilla beringei) male, Virunga Mountains, Volcanoes National Park, Rwanda

Yukihiro Fukuda / Japanese macaque (Macaca fuscata) baby, three months old, Jigokudani, Joshinetsu Kogen NP, Nagano, Japan

Andy Rouse / Chimpanzee (Pan troglodytes) resting, Mahale NP, Tanzania (non-ex)

Wild Wonders of Europe / Widstrand / Stingray (Dasyatis pastinaca) caught in fishing net, Sardinia, Italy, July 2008

Andy Rouse / Chimpanzee (Pan troglodytes) portrait, Mahale NP, Tanzania

Edwin Giesbers / Diademed sifaka (Propithecus diadema diadema) portrait, Madagascar, captive

Gertrud & Helmut Denzau / Head of dead Snow leopard {Panthera uncia}. Ladakh, NE India

Eric Baccega / Male orang-utan (Pongo pygmaeus) with head on hand. Native to Borneo. Captive, France

Eric Baccega / Head portrait of male silverback western lowland gorilla (Gorilla gorilla gorilla) captive, France

Eric Baccega / Head portrait of male silverback western lowland gorilla (Gorilla gorilla gorilla) captive, France

Suzi Eszterhas / Grizzly bear {Ursus arctos horribilis} 6month lost cub peering out from branches of coniferous tree, Knight Inlet, British Columbia, Canada

Jane Burton / Young sandy lop-eared rabbit, nine-weeks, with drooping years

Jane Burton / Young sandy lop-eared rabbit looking timid

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) keeper, He Changgui tearfully places Mao Mao's favorite food next to her tombstone after the May 12, 2008 earthquake and landslides, CCRCGP, Wolong, China

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) keeper, He Changgui tearfully places Mao Mao's favorite food next to her tombstone after the May 12, 2008 earthquake and landslides, CCRCGP, Wolong, China

Petra Wegner / Rhodesian Ridgeback puppy, 3 months, face portrait

Petra Wegner / Pug puppy, 16 weeks, portrait

Petra Wegner / Black and tan English Cocker Spaniel lying down

Jouan & Rius / Red Ruffed Lemur (Varecia variegata ruber / rubra) curled up between branches, Masoala peninsula, East Madagascar

Richard Du Toit / Hippopotamus {Hippopotamus amphibius) licking carcass of dead baby hippo, Moremi Wildlife Reserve, Botswana

Eric Baccega / Subadult Giant panda (Ailuropoda melanoleuca) climbing in a tree Wolong Nature Reserve, China, captive

Eric Baccega / Fu Long, the first European naturally born Giant panda (Ailuropoda melanoleuca) baby in his den, 6 months old, Schonbrunn Zoo, Austria, 2008

Petra Wegner / Leonberger sitting down

Petra Wegner / Great Swiss Mountain Dog puppy, 14 weeks, sitting portrait

Petra Wegner / English Springer Spaniel lying down

Petra Wegner / Mixed Breed puppy, 5 months old, lying down with chin on the floor.

Sue Flood / Close-up of African elephant (Loxodonta africana) head, Okavango delta

Ingo Arndt / Red Uakari (Cacajao calvus) female, Amazon Ecosystem, Brazil

Ingo Arndt / Red Uakari (Cacajao calvus) female, Amazon Ecosystem, Brazil

Jane Burton / Jack Russell puppy portrait

Eric Baccega / Orang utan female (Pongo pygmaeus) aged 32 years. Captive, red list of endangered species

SINCLAIR STAMMERS / Lumpsucker {Cyclopterus lumpus} stranded on beach, Isle of Wight, UK

Anup Shah / Old wounded, male African lion {Panthera leo} moves in to feed on Topi carcass once the main pride has finished feeding, Masai Mara GR, Kenya

Anup Shah / Thomson's gazelle {Gazella thomsoni} hunched and looking miserable in the rain, Serengeti NP, Tanzania

Matthew Maran / Captive Sumatran orang Utan {Pongo abelii} mother and baby in cage, Matang Wildlife Cente, Sabah, Malaysia

Matthew Maran / Toque Macaques {Macaca sinica} grooming dead macaque after fatal bite from another macaque, Dambulla, Sri Lanka

Jane Burton / Mastiff bitch puppy, 10 months old, on lead

Jane Burton / Border Collie x Staffordshire Bull Terrier pup, 8 weeks old, lying down with head up

Jane Burton / Mastiff bitch puppy, 8 weeks old, sitting with tail curled up.

Jane Burton / Blue Italian Mastiff pup, 12 weeks old, sitting portrait