Heather Angel / Giant panda (Ailuropoda melanoleuca) sliding down slope on back after losing footing. Panda Breeding Centre, Wolong, Sichuan, China. January 1987.

Andy Rouse / Portrait of a Grizzly Bear (Ursus arctos) cub with paw over face. Katmai, Alaska, USA, September. Not available for ringtone/wallpaper use.

Danny Green / North American river otter (Lontra canadensis) on back, rolling on snow bank. Yellowstone National Park, USA, January.

Danny Green / Bengal tiger (Panthera tigris tigris) resting on track. Bandhavgarh National Park, India, December.

Danny Green / Bengal tiger (Panthera tigris tigris) male resting in undergrowth, portrait. Bandhavgarh National Park, India, December.

Alex Mustard / Light patterns on the seabed and fluffy cumulus clouds in the sky in a split level image. North Sound, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Danny Green / Reindeer (Rangifer tarandus) hunkering down in snow during blizzard. Svalbard, Norway, April.

Oriol Alamany / Gelada Baboon (Theropithecus gelada) male lying in a forest glade at around 3,000 metres of altitude, Simien Mountains National Park, Amhara, Ethiopia.

Gabriel Rojo / Jaguar (Panthera onca) lying on tree roots, portrait. Mato Grosso, Pantanal, Brazil.

Lucas Bustamante / Sri Lankan leopard (Panthera pardus kotiya) rolling on its back, Yala National Park, Sri Lanka

Klein & Hubert / Wild mustangs, bay foal lying in wild flowers, Rocky Mountains, USA. June.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) chicks lying down in the cold, Atka Bay, Queen Maud Land, Antarctica. October.

Tony Wu / Humpback whale (Megaptera novaeangliae) lying on its side while executing a series of pectoral fin slaps on ocean surface. Vava'u, Tonga, South Pacific.

Nick Hawkins / Galapagos sea lion (Zalophus wollebaeki), three resting underneath school bus. Isabela Island, Galapagos. 2017.

Karine Aigner / Bengal tiger (Panthera tigris tigris) head, close up. Ranthambore National Park, Rajasthan, India.

Nick Garbutt / RF - Skull of a male Himalayan ibex (Capra sibirica) (killed by a snow leopard) lying on steep rocky slope. Himalayas, Ladakh, northern India. (This image may be licensed either as rights managed or r...

Klein & Hubert / Red-ruffed lemur (Varecia rubra) lying on branch in tropical forest, Madagascar.

Guy Edwardes / Fairy Pools and Black Cuillins, Glen Brittle, Isle of Skye, Inner Hebrides, Scotland, UK. February 2017.

Guy Edwardes / View from Colmer's Hill over countryside with low lying mist, Bridport, Dorset, England, UK. April 2016.

Neil Aldridge / African lion (Panthera leo) male lying in the middle of the Busanga Plains, Kafue National Park, Zambia. Vulnerable

Mark Taylor / Yellow Labrador Retriever puppy, age 9 weeks, lying with head up.

Mark Taylor / Tabby kitten, 6 weeks, lying with head up and raised paw.

Pal Hermansen / Inuit sled dogs resting, near Ittoqortoormiit, Scoresbysund, Greenland. Second Prize in the Nature category of the Spider Black and White Photography Competition 2015.

Dave Watts / Female Western grey kangaroo (Macropus fuliginosus) rolling with a large joey in her pouch, Kangaroo Island, South Australia.

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant male 'Gizmo' aged 2 years lying on the forest floor. Gombe National Park, Tanzania.

Espen Bergersen / Svalbard reindeer (Rangifer tarandus platyrhynchus) rear view lying down, resting at sunset, Svalbard, Norway. April.

Roy Mangersnes / Juvenile female Polar bear (Ursus maritimus) lying down protecting a seal carcass at sunset, Svalbard, Norway, March.

Anup Shah / Cheetah (Acinonyx jubatus) male juvenile aged about 18 months approaching a kill, wide angle view. Maasai Mara National Reserve, Kenya.

Staffan Widstrand / White Arctic fox (Alopex lagopus) in its winter fur looking at the camera, Svalbard, Norway, Arctic, September

Espen Bergersen / Red fox (Vulpes vulpes) walking through snow, Lapland, Finland, March.

Danny Green / Coastal brown bear (Ursus arctos) resting, Lake Clarke National Park, Alaska, September.

Enrique Lopez-Tapia / Man feeding Hyaenas (Crocuta crocuta) at night in Harar City, this has been a tradition for several centuries, and has now become a show for tourists. Ethiopia, November 2014

Enrique Lopez-Tapia / Man feeding Hyaenas (Crocuta crocuta) at night in Harar City, this has been a tradition for several centuries, and has now become a show for tourists. Ethiopia, November 2014

Cyril Ruoso / Bonobo (Pan paniscus) newborn baby sleeping next to mother, Lola Ya Bonobo Sanctuary, Republic of the Congo. Non-ex

Cyril Ruoso / Giant panda (Ailuropoda melanoleuca) mother and young playing, captive, Sichuan, China. Non-ex

Cyril Ruoso / Bonobo (Pan paniscus) male and female copulating, Lola ya Bonobo Sanctuary, Democratic Republic of Congo

Theo Webb / Bonobo (Pan paniscus) lying in a day nest, Max Planck research site, LuiKotale, Salonga National Park, Democratic Republic of Congo.

Theo Webb / Female Bonobo (Pan paniscus) tickling her infant, Max Planck research site LuiKotale, Salonga National Park, Democratic Republic of Congo.

Klein & Hubert / Snow leopard (Uncia uncia) female lying between rocks, captive.

Solvin Zankl / Brown hyena (Hyaena brunnea) stalking fur seal (Arctocephalus pusillus) pup, Sperrgebiet National Park, Namibia, December. Sequence 1/8

Solvin Zankl / Black backed jackal (Canis mesomelas) attacking Cape fur seal (Arctocephalus pusillus) pup, Sperrgebiet National Park, Namibia, December. Sequence 3/6

Andy Rouse / Bengal tiger (Panthera tigris tigris) 11 month cubs with mother 'T19 Krishna' in background, Ranthambhore National Park, India.

Hugh Pearson / Leopard (Panthera pardus) resting, Erindi Game Reserve, Namibia.

Paul Hobson / Otter (Lutra lutra) female grooming in seaweed, Mull, Scotland, UK, September.

Olga Kamenskaya / Baikal seals (Pusa sibirica) hauled out on rock. Endemic to Lake Baikal. Russia, May.

Fred Olivier / Adelie penguin (Pygoscelis adeliae) lying down to incubate an egg, Antarctica.

Sam Hobson / Young urban Red fox (Vulpes vulpes). Bristol, UK. August.

Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) mother lying on back and holding baby age one year. Parc National des Volcans, Rwanda. Endangered species