Dr. Axel Gebauer / Aerial view of Red deer (Cervus elaphus) walking through pond with Water caltrop (Trapa natans) and blue bacteria, surrounded by Reedbeds (Phragmites australis), Biosphere Reserve, Upper Lusatia, Pola...

Ann & Steve Toon / Three Giraffes (Giraffa camelopardalis) silhouetted at sunset, Chobe National Park, Botswana.

Doug Gimesy / Grey-headed flying-fox (Pteropus poliocephalus) in flight after dipping into water to cool down and drink, Myuna Wetlands, Doveton, Victoria, Australia.

Gabriel Rojo / Geoffroy's cat (Leopardus geoffroyi) walking past seaweed covered rocks on beach, Punta Norte Nature Reserve, Peninsula Valdes, Chubut Province, Patagonia, Argentina.

Gabriel Rojo / Geoffroy's cat (Leopardus geoffroyi) walking along beach with Gulls (Larus sp.) in background, Punta Norte Nature Reserve, Peninsula Valdes, Chubut Province, Patagonia, Argentina.

George Sanker / Coyote (Canis latrans) hunting in a wetland meadow in summer, Yellowstone National Park, Wyoming, USA. June.

Jussi Murtosaari / Two Brown bear (Ursus arctos) males, fighting, Finland. August.

Jussi Murtosaari / Grey wolf (Canis lupus) shaking fur dry after swimming, Finland. August.

Jussi Murtosaari / Bank vole (Clethrionomys glareolus) standing on hind legs, feeding on Strawberry (Fragaria sp.) leaves, Finland. July.

Mark Carwardine / European hare (Lepus europaeus) sitting alert at edge of woodland, Hungary. June.

Mark Carwardine / Humpback whale (Megaptera novaeangliae) surfacing, Antarctic Peninsula, Southern Ocean.

Mark Carwardine / Brown bear (Ursus arctos) female, standing at edge of river, Great Bear Rainforest, British Columbia, Canada. October.

Oliver Hellowell / Red squirrel (Sciurus vulgaris) standing on mossy rock in woodland garden, Perthshire, Scotland, UK. September. Cropped.

Oliver Hellowell / Red squirrel (Sciurus vulgaris) sitting upright among heather, in woodland garden, Perthshire, Scotland, UK. September. Cropped.

Oliver Hellowell / Red squirrel (Sciurus vulgaris) sitting on mossy rock in woodland garden, Perthshire, Scotland, UK. September. Cropped.

Oliver Hellowell / Red squirrel (Sciurus vulgaris) standing at base of Pine tree in woodland garden, Perthshire, Scotland, UK. September. Cropped.

Pal Hermansen / Musk ox (Ovibos moschatus) pair mating, Dovrefjell-Sunndalsfjella National Park, Norway. September.

Joel Sartore / Photo Ark / Grandidier's mongoose / Grandidier's vontsira (Galidictis grandidieri) looking around, Al Bustan Zoological Centre. Captive. Endangered.

Joel Sartore / Photo Ark / Eastern quoll (Dasyurus viverrinus) lying down and looking at the camera, Zoo Leipzig. Captive. Endangered.

Joel Sartore / Photo Ark / Proboscis monkey (Nasalis larvatus) male using its hands to pick food up and eat. The animal leaves the frame. Taman Safari Prigen. Captive. Endangered.

Joel Sartore / Photo Ark / Hawaiian monk seal (Neomonachus schauinslandi) vocalising. The animal's head appears from bottom of the frame. Minnesota Zoo. Captive. Endangered.

Joel Sartore / Photo Ark / Marbled cat (Pardofelis marmorata longicaudata) looking towards the camera and lying down. The animal hisses and bares its teeth. Al Bustan Zoological Centre, Sharjah. Captive.

Joel Sartore / Photo Ark / San Bernardino kangaroo rat (Dipodymys merriami parvus) looking at the camera, then the animal partially leaves frame, San Diego Zoo Safari Park, Escondido, California. Captive. Federally endangered.

Joel Sartore / Photo Ark / Slender-horned gazelle (Gazella leptoceros) appearing from bottom of frame and looking around, San Diego Zoo Safari Park. Captive. Endangered.

Joel Sartore / Photo Ark / Okapi (Okapia johnstoni) juvenile male, two months old, flicking a fly off its face with its tongue. Leucistic individual, named 'Mzimu' (meaning ghost in Swahili), Al Bustan Zoological Centre, Sharja...

Joel Sartore / Photo Ark / Okapi (Okapia johnstoni) juvenile male, two months old, standing and looking around. Leucistic individual, named 'Mzimu' (meaning ghost in Swahili), Al Bustan Zoological Centre, Sharjah. Captive. Enda...

Joel Sartore / Photo Ark / Eastern black bear (Ursus americanus americanus) juvenile, four months old, looking at the camera and moving curiously towards the camera, North Carolina Zoo Wildlife Rehabilitation Center, USA. Contr...

Matthew Maran / Red fox siblings (Vulpes vulpes) fighting on an allotment, London, England.

Matthew Maran / Red fox (Vulpes vulpes) peering through a hole in a garden fence at night, London, England. Taking using a camera trap.

Matthew Maran / Red fox (Vulpes vulpes) playing with a child's ball on an allotment, London, England.

Matthew Maran / Red fox cub (Vulpes vulpes) in allotment, London, England.

Matthew Maran / Red fox cub (Vulpes vulpes) drinking from a trough on allotment, London, England.

Matthew Maran / Red fox cub (Vulpes vulpes) on allotment at dusk, London, England.

Matthew Maran / Red fox cub (Vulpes vulpes) peers out from behind water trough on allotment, London, England.

Sven Zacek / Red fox (Vulpes vulpes) juvenile, sitting on rocks along the shore, Laane-Virumaa county, Northern Estonia.

Sven Zacek / Two Red fox (Vulpes vulpes) juveniles, sitting in dewy meadow at sunrise, Valgamaa county, Southern Estonia.

Sven Zacek / Two Moose (Alces alces) juveniles, standing at edge of forest, looking back, Tartumaa county, Southern Estonia.

Lorraine Bennery / Ring-tailed mongoose (Galidia elegans) leaping, Montagne D'Ambre National Park, Madagascar.

Jen Guyton / Chimpanzee (Pan troglodytes) resting in tree, Kibale National Park, Uganda. Endangered.

Jen Guyton / Chimpanzee (Pan troglodytes) relaxing on forest floor, Kibale National Park, Uganda. Endangered.

Espen Bergersen / Two Orcas (Orcinus Orca) swimming at sea surface with mountains in background, Skjervoy, Troms, Norway, Norwegian Sea. October.

Espen Bergersen / Reindeer (Rangifer tarandus) domestic, walking down a mountain at dusk, Troms, Norway. July.

Espen Bergersen / Moose (Alces alces) reaching head up to graze on Willow tree, Troms, Norway, March. Cropped.

Espen Bergersen / Moose (Alces alces) feeding on a tree, Troms, Norway. March.

Danny Green / Polar bear (Ursus maritimus) male, walking across snow covered landscape with mountains in background, Svalbard, Norway. April.

Danny Green / Ringed seal (Pusa hispida) pup, resting on ice, Svalbard, Norway. April.

Andrew Parkinson / Bengal tiger (Panthera tigris tigris) female juvenile, displaying aggressive behaviour towards its father, Bandhavgarh National Park, India. Endangered.

Will Watson / Representation of Lion's (Panthera leo) head with raised paw representing evil on Eardisley Font, carved in the mid 12th century in the Romanesque style, Herefordshire, England, UK.

Mike Read / Eurasian otter (Lutra lutra) cub feeding on Velvet swimming crab (Necora puber) at the edge of Loch Linnhe, Kingairloch, Scotland, UK, May.

Mike Read / Eurasian otter (Lutra lutra) cub feeding on Velvet swimming crab (Necora puber) at the edge of Loch Linnhe, Kingairloch, Scotland, UK, May.

Graham Eaton / Bottlenose dolphin (Tursiops truncatus) surfacing with St Tudwals Islands behind , Abersoch, Gwynedd, Wales, UK, Cardigan Bay, July.

Graham Eaton / Bottlenose dolphin (Tursiops truncatus) surfacing with Llyn Peninsula behind, Abersoch, Gwynedd, Cardigan Bay, May.

Graham Eaton / Bottlenose dolphins (Tursiops truncatus) surfacing, Abersoch, Gwynedd, Wales, UK, Cardigan Bay, May.

Graham Eaton / Bottlenose dolphin (Tursiops truncatus) pod surfacing and swimming under water's surface, with Llyn Peninsula behind, Abersoch, Gwynedd, Wales, UK, Cardigan Bay, May.

Graham Eaton / Bottlenose dolphin (Tursiops truncatus) surfacing, Cardigan Bay, Wales, Irish Sea, May.

Graham Eaton / Tail of Bottlenose Dolphin (Tursiops truncatus) out of water as it breaches, Wales, Cardigan Bay, May.

Danny Green / Rabbit (Oryctolagus cuniculus) infant, aged 6 weeks, sitting in evening sunlight not far from the burrow, Fair Isle, Shetland Isles, Scotland, UK. May.

Tim Laman / Bornean orangutan (Pongo pygmaeus) young male climbs up tree trunk in rainforest, Gunung Palung National Park, West Kalimantan, Borneo, Indonesia. Remote camera. Outright winner Wildlife Photographer...

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) sitting upright, alert, in field, Norfolk, UK. June.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) juvenile, sitting in field with front paws raised, Norfolk, UK. June.

Andrew Parkinson / Two Rabbits (Oryctolagus cuniculus) juveniles, sitting in field close to the warren in evening light, Norfolk, UK. May.

Andrew Parkinson / Two Rabbits (Oryctolagus cuniculus) juveniles, sitting in field close to the warren in evening light, Isle of Lewis, Outer Hebrides, UK.July.

Andrew Parkinson / Two Rabbits (Oryctolagus cuniculus) sub-adults, sitting alert close to the warren, Norfolk, UK. May.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) juvenile, emerging cautiously from the warren in evening light, Norfolk, UK. June.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) juvenile, with tongue poking out, head portrait, Norfolk, UK. May.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) juvenile, portrait, Norfolk, UK. June.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) juvenile, sitting alert in evening light, Norfolk, UK. May.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) juvenile, portrait, Norfolk, UK. June.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) juvenile, sitting under nettles Norfolk, UK. June. June.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) juvenile, sitting on a sandy track, basking in evening sun, Isle of Lewis, Outer Hebrides, Scotland, UK. July.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) juvenile, sitting alert near the warren, Norfolk, UK. May.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) juvenile, sitting in evening sun close to the warren, Isle of Lewis, Outer Hebrides, UK. July.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) juvenile, sitting alert in field in evening light, Norfolk, UK. May.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) sub-adult, sitting in open grassland, Norfolk, UK. June.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) juvenile, sitting upright next to Nettles (Urtica dioica), Norfolk, UK. May.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) juvenile, sitting upright in grassland with adult behind, Norfolk, UK. June.

Andrew Parkinson / Rabbit (Oryctolagus cuniculus) female, sitting upright, alert, with infant feeding on grass close by, Norfolk, UK. June.

Nick Garbutt / Humpback whales (Megaptera novaeangliae) lunge feeding with flocks of Glaucous-winged gulls (Larus glaucescens) above, Sitka Sound, south east Alaska, USA. March

Nick Garbutt / Puma (Puma concolor) juvenile male, resting in deep snow, Torres del Paine National Park / Estancia Amarga, Patagonia, Chile. July.

Nick Garbutt / Puma (Puma concolor) juvenile male, resting in snow, looking up towards passing aeroplane, Torres del Paine National Park / Estancia Amarga, Patagonia, Chile. July.

Nick Garbutt / Puma (Puma concolor) female, walking along snow covered ridgeline with mist covered valley (inversion) and early morning light on the Torres del Paine Massif in background, Torres del Paine National P...

Nick Garbutt / Group of Black-and-gold howler monkeys (Alouatta caraya) females with infants, resting on tree branch, Cuiaba River, Northern Pantanal, Brazil.

Bret Charman / Red deer (Cervus elaphus) stag standing on heathland at sunset during autumn rut, Ober Heath, New Forest, Hampshire, UK. October.

Bret Charman / Platypus (Ornithorhynchus anatinus) swimming on surface of small lake, Tasmania, Australia.

Bret Charman / Two African bush elephants (Loxodonta africana) juvenile males, sparring, Mara Triangle Conservancy, Masai Mara, Kenya. Endangered.

Bret Charman / Three Japanese macaques (Macaca fuscata) juveniles, play fighting, Yamanouchi, Japan.

Bret Charman / Humpback whale (Megaptera novaeangliae) pod, bubble-net feeding at water surface, Tebenkof Bay, Alaska, USA. July.

Bret Charman / Japanese macaque (Macaca fuscata) emerging from thermal pool, Jigokudani, Yamanouchi, Japan.

Bret Charman / Waterbuck (Kobus ellipsiprymnus) male, standing in long marshland grass, Mara Triangle Conservancy, Kenya.

Bret Charman / Japanese macaque (Macaca fuscata) sitting in warm waters of a hot spring, Jigokudani, Yamanouchi. Nagano Prefecture, Japan.

Bret Charman / Japanese macaque (Macaca fuscata) head portrait, Jigokudani, Yamanouchi. Nagano Prefecture, Japan.

Bret Charman / African lion (Panthera leo) male, head portrait, showing unusual eye pigmentation, South Luangwa National Park, Zambia.

Bret Charman / Arctic fox (Vulpes lagopus) 'blue morph' standing in snow with Sea urchin (Echinoidea) prey in mouth with mountains behind, Hornstrandir Nature Reserve, Iceland. March.

Bret Charman / Arctic fox (Vulpes lagopus) 'blue morph' standing on snowy ridge, looking back, Hornstrandir Nature Reserve, Iceland. March.

Bret Charman / Roe deer (Capreolus capreolus) walking through long vegetation at edge of field at sunset, South Downs National Park, Hampshire, UK. June.

Bret Charman / Two Red deer (Cervus elephus) stags rutting in thick morning mist on heathland, New Forest, Hampshire, UK. October.