Shattil & Rozinski / Four Red fox (Vulpes vulpes) cubs playing with a doormat, Denver, Colorado, USA, April.

David Pattyn / Harbor seals (Phoca vitulina) group resting on rocks. Vancouver Island, British Columbia, Canada, August.

David Pattyn / Orca (Orcinus orca) pod surfacing, Johnstone strait, British Columbia, Canada, August.

Loic Poidevin / Two young Grizzly bears (Ursus arctos horribilis) suckling, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Loic Poidevin / Black-winged stilt (Himantopus himantopus) at nest, with four eggs, Marais breton, Brittany / Bretagne, France, May.

Chris & Monique Fallows / Pink Salmon (Oncorhynchus gorbuscha) fighting for the right to mate in a small shallow river, Prince William Sound, Alaska, August.

Georgette Douwma / Red Soldierfish (Myripristis murdjan) sheltering in soft corals. Egypt, Red Sea.

Will Watson / Two Black Gypsy Cobs and two Welsh Ponies (Equus caballus), Cefn Hill, Herefordshire, England, May.

Will Watson / Four Hereford bullocks looking over a fence with Cow Parsley (Anthriscus sylvestris) Worcestershire, England, May.

Paul Hobson / Puffins (Fratercula arctica) in snow in winter plumage, Norway, March.

Paul Hobson / Puffins (Fratercula arctica) in snow in winter plumage, Norway, March.

Loic Poidevin / Female Grizzly bear (Ursus arctos horribilis) and two juveniles entering water, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Loic Poidevin / Female Grizzly bear (Ursus arctos horribilis) with two cubs, eating grass, Khutzeymateen Grizzly Bear Sanctuary, British Columbia, Canada, June.

Konrad Wothe / Chestnut-fronted Macaws (Ara severa) at clay lick, Tambopata National Reserve, Peru, South America.

Konrad Wothe / Red-and-green Macaws (Ara chloroptera) at clay lick, Tambopata National Reserve, Peru, South America.

Konrad Wothe / Red-and-green Macaws (Ara chloroptera) at clay lick, Tambopata National Reserve, Peru, South America.

Konrad Wothe / Red-and-green Macaws (Ara chloroptera) in flight, Tambopata National Reserve, Peru, South America.

Konrad Wothe / Hoatzins (Opisthocomus hoazin) perched in tropical rainforest, Tambopata Reserve, Peru, South America.

Enrique Lopez-Tapia / Little egrets (Egretta garzetta) on the banks of Narayani river, Royal Chitwan National Park, Nepal.

Enrique Lopez-Tapia / Domestic Asian elephants (Elephas maximas) used for riding safaris with their keepers, Royal Chitwan National Park, Nepal.

Enrique Lopez-Tapia / Domestic Asian elephants (Elephas maximas) used for riding safaris with their keepers, Royal Chitwan National Park, Nepal.

Juan Carlos Munoz / Fallow deer (Dama dama) stags, captive, Cabarceno Park, Cantabria, Spain, June.

Juan Carlos Munoz / Red deer (Cervus elaphus) stags in velvet, captive, Cabarceno Park, Cantabria, Spain, July.

Tim Laman / Hoatzin (Opisthocomus hoazin) along Anangu creek, Yasuni National Park, Orellana Province, Ecuador, July.

Christophe Courteau / Three African wild dogs (Lycaon, pictus) running, Mala Mala Game Reserve, South Africa, June.

Christophe Courteau / Two African wild dogs (Lycaon pictus) greeting, Mala Mala Game Reserve, South Africa, June.

Christophe Courteau / Pack of African wild dogs (Lycaon pictus), Mala Mala Game Reserve, South Africa, June.

Edwin Giesbers / Oriental small clawed otter (Aonyx cinerea), captive.

Edwin Giesbers / Raccoon dog (Nyctereutes procyonoides) with two nine week old cubs, captive, native to East Asia.

Mike Wilkes / Burchell's zebra (Equus quagga burchellii) Serengeti, Tanzania

Mike Wilkes / Group of Bat-eared fox (Otocyon megalotis) sitting outside den in early morning, Ndutu, Tanzania.

Edwin Giesbers / Three European grey wolves (Canis lupus) interacting, captive, Norway, February.

Michele Westmorland / Galapagos giant tortoises (Chelonoidis nigra) taking mud bath, Galapagos Islands. Vulnerable species.

Roger Powell / Five Ruffs (Philomachus pugnax) four satellite males and one territorial male waiting for females (Reeves) to visit the lek. Varanger, Finmark, Norway, May.

Michele Westmorland / Galapagos giant tortoises (Chelonoidis nigra) taking mud bath, Galapagos Islands. Vulnerable species.

Michele Westmorland / Shoal of small (unidentified) fish and Pacific creolefish (Paranthias colonus) over lava rock islands Galapagos Islands.

Ann & Steve Toon / Harvest mice (Micromys minutus), captive, UK, June

Charlie Summers / Three male Arctic graylings (Thymallus arcticus) displaying to a female, the males vibrate their tails to kick up a fine stream bottom silt, the female ejects roe and the males eject milt into this s...

Charlie Summers / Male Arctic grayling (Thymallus arcticus) displaying to a female, with a small Greenback cutthroat trout (Oncorhynchus clarki stomias) nearby, Colorado, USA, July.

Fergus Gill / Whooper Swan (Cygnus cygnus) adult bird in afternoon light with mute swan (cygnus olor) behind. Glasgow, Scotland, December.

Fergus Gill / Guillemots (Uria aalge) at a seabird colony. Fowlsheugh, Scotland, June.

Pascal Tordeux / Group of young domestic Holstein cattle (Bos taurus) resting underneath an oak tree, Thiérache, France, May 2013.

Roger Powell / Four Little bustards (Tetrax tetrax) in flight, Castro Verde, Alentejo, Portugal, April.

Roger Powell / Group of male Great bustards (Otis tarda) gathered at a lek, Castro Verde, Alentejo, Portugal, March.

Roger Powell / Group of male Great bustards (Otis tarda) gathered at a lek, Castro Verde, Alentejo, Portugal, March.

Mark Taylor / Miniature American Shepherds: Black-and-white dog 'Mac' aged 19 months, and tricolour merle bitch, 'Yana' aged 16 months, with tricolour Border Collie dog 'Keen'

Mark Taylor / Tricolour Rough Collie puppy and baby red Guinea pigs.

Mark Taylor / Three Rough Collie pups, 7 weeks.

Mark Taylor / Five Boxer puppies, 8 weeks.

Mark Taylor / Yellow Labrador Retriever puppy, aged 8 weeks, with rabbit and Guinea pig.

Ann & Steve Toon / Meerkats (Suricata suricatta) standing alert, Kgalagadi Transfrontier Park, Northern Cape, South Africa, January.

Ann & Steve Toon / Meerkats (Suricata suricatta) standing alert, Kgalagadi Transfrontier Park, Northern Cape, South Africa, January.

Ann & Steve Toon / Meerkats (Suricata suricatta) standing alert, Kgalagadi Transfrontier Park, Northern Cape, South Africa, January.

Ann & Steve Toon / Greater kudu (Tragelaphus strepsiceros), Kgalagadi Transfrontier Park, South Africa, January.

Anup Shah / Bonnet macaque (Macaca radiata) male calling on a rock with others in the background Anamalai Tiger Reserve, Western Ghats, Tamil Nadu, India.

Anup Shah / Lion-tailed macaques (Macaca silenus) grooming. Anamalai Tiger Reserve, Western Ghats, Tamil Nadu, India.

Anup Shah / Lion-tailed macaques (Macaca silenus) grooming. Anamalai Tiger Reserve, Western Ghats, Tamil Nadu, India.

Anup Shah / Bonnet macaque (Macaca radiata) male sitting on a rock with others in the background Anamalai Tiger Reserve, Western Ghats, Tamil Nadu, India.

Anup Shah / Lion-tailed macaques (Macaca silenus) grooming. Anamalai Tiger Reserve, Western Ghats, Tamil Nadu, India.

Anup Shah / Lion-tailed macaques (Macaca silenus) playing. Anamalai Tiger Reserve, Western Ghats, Tamil Nadu, India.

Anup Shah / Lion-tailed macaques (Macaca silenus) feeding on jack fruit. Anamalai Tiger Reserve, Western Ghats, Tamil Nadu, India.

Anup Shah / Bonnet macaque (Macaca radiata) male sitting on a rock with others in the background Anamalai Tiger Reserve, Western Ghats, Tamil Nadu, India.

Philippe Clement / Juvenile Smooth newts (Lissotriton vulgaris / Triturus vulgaris) hiding in crevices of tree trunk in spring, Belgium, May. Captive.

Philippe Clement / Juvenile Smooth newts (Lissotriton vulgaris / Triturus vulgaris) hiding in crevices of tree trunk in spring, Belgium, May. Captive.

Chris & Monique Fallows / King penguin (Aptenodytes patagonicus) South Georgia Island, Antarctica

Robin Chittenden / Rufous-vented Chachalacas (Ortalis ruficauda ruficauda) displaying, Tobago, Trinidad and Tobago May 2013

Kim Taylor / White Ibis (Eudocimus albus) group of three in flight, Costa Rica

Wild Wonders of Europe / Widstr / Griffon vultures (Gyps fulvus) Madzharovo, Eastern Rhodope Mountains, Bulgaria, May 2013.

Wild Wonders of Europe / Widstr / Griffon vulture (Gyps fulvus) group on rocks, Madzharovo, Eastern Rhodope Mountains, Bulgaria, May 2013.

Wild Wonders of Europe / Widstr / Wild living, reintroduced Konik horses, Sbor abandoned village, Eastern Rhodope Mountains, Bulgaria, May.

Wild Wonders of Europe / Widstr / Wild living, reintroduced Konik horses, Sbor abandoned village, Eastern Rhodope Mountains, Bulgaria, May.

Juan Carlos Munoz / Proboscis monkeys (Nasalis larvatus) climbing up and sitting in a Mangrove tree in the rain, Sabah, Malaysia, Borneo.

Juan Carlos Munoz / Three Proboscis monkeys (Nasalis larvatus) sitting on a Mangrove tree root, Sabah Malaysia, Borneo.

Kristel Richard / The drivingr (in black) and grooms (in red) from the Haras Du Pin, France's oldest national stud, driving three Norman Cob, harnessed to an omnibus, in the Cour D'Honneur, at Le Pin-au-Haras, Orne, Lo...

Kristel Richard / The drivingr (in black) and grooms (in red) from the Haras Du Pin, France's oldest national stud, driving three Norman Cob, harnessed to an omnibus, on the Avenue Louis XIV, at Le Pin-au-Haras, Orne,...

Kristel Richard / The drivingr (in black) and grooms (in red) from the Haras Du Pin, France's oldest national stud, driving three Norman Cob, harnessed to an omnibus, on the Avenue Louis XIV, at Le Pin-au-Haras, Orne,...

Kristel Richard / Five Franches Montagnes / Freiberger (Equus caballus) stallions in heavy rain at the National Stud of Avenches, Vaud, Switzerland, July.

Kristel Richard / Five Franches Montagnes / Freiberger (Equus caballus) stallions in heavy rain at the National Stud of Avenches, Vaud, Switzerland, July.

Kristel Richard / Three Franches Montagnes / Freiberger (Equus caballus) stallions galloping in heavy rain at the National Stud of Avenches, Vaud, Switzerland, July.

Kristel Richard / Four Franches Montagnes / Freiberger (Equus caballus) stallions trotting in heavy rain at the National Stud of Avenches, Vaud, Switzerland, July.

Kristel Richard / Three Franches Montagnes / Freiberger (Equus caballus) stallions fighting in heavy rain at the National Stud of Avenches, Vaud, Switzerland, July.

Kristel Richard / Three Giant African Land Snails (Achatina fulica) on wooden boards in the rain, Mahe, Seychelles, May

Kristel Richard / Four East Bulgarian mares running in snow, Kabiuk National Stud, Shumen, Bulgaria.

Wild Wonders of Europe / Widstr / Fallow deer (Dama dama) male with growing antlers with females, Studen Kladenets reserve, Eastern Rhodope Mountains, Bulgaria, May 2013.

Eric Baccega / Black-legged kittiwakes (Rissa tridactyla) nesting on a cliff face, British Columbia, Canada, June.

Eric Baccega / Black-legged kittiwakes (Rissa tridactyla) nesting on a cliff face, British Columbia, Canada, June.

Eric Baccega / Group of Steller sea lions (Eumetopias jubatus) sunbathing on a rock, Prince Rupert, British Columbia, Canada, June.

Eric Baccega / Male Steller sea lion (Eumetopias jubatus) scratching, with a group of females hauled out at a rookery, Prince Rupert, British Columbia, Canada, June.

Eric Baccega / Male Steller sea lion (Eumetopias jubatus) scratching, with a group of females hauled out at a rookery, Prince Rupert, British Columbia, Canada, June.

Eric Baccega / Male Steller sea lion (Eumetopias jubatus) with a group of females hauled out at a rookery, Prince Rupert, British Columbia, Canada, June.

Denis-Huot / Yellow-throated Sandgrouse (Pterocles gutturalis) soaking up water in his feathers after drinking, to carry to his chicks to drink, Lake Magadi, Kenya

Denis-Huot / Yellow-throated Sandgrouse (Pterocles gutturalis) soaking up water in his feathers after drinking, to carry to his chicks to drink, Lake Magadi, Kenya

Danny Green / Three Chital deer (Axis axis) running, Bandhavgarh National Park, India, February

Denis-Huot / Lesser flamingos (Phoeniconaias minor) feeding, Lake Nakuru, Kenya

Denis-Huot / Lesser flamingo (Phoeniconaias minor) males in display, Lake Nakuru, Kenya

Denis-Huot / Lionesses (Panthera leo) nuzzling up to one another, Masai-Mara Game Reserve, Kenya