Axel Gomille / Sloth Bear (Melursus ursinus) female with large cubs (on right) trying to fight off rogue male. Karnataka, India, March.

Axel Gomille / Sloth Bear (Melursus ursinus) mother with cub riding on her back. Karnataka, India, April. Did you know? The sloth bear is the only bear that carries its young on its back.

John MacPherson / 2020VISION / Bottlenose dolphin (Tursiops truncatus) two breaching in evening light, Moray Firth, Inverness-shire, Scotland, UK, August, sequence 2/2. Photographer quote: 'A day of overcast cloud cleared in the la...

Carol Walker / Grey Andalusian / Spanish stallion running, California, USA

Wild Wonders of Europe / Lesniewski / Herd of wild Carpathian Ponies / Hurcul (Equus caballus) running in snow. Bieszczady, Carpathian Mountains, Poland, March.

Andy Rouse / 2020VISION / Wild boar (Sus scrofa) female in woodland undergrowth smelling air for scent of human, Forest of Dean, Gloucestershire, UK, March. Photographer quote: 'I am not sure if it was my lack of smelly shower...

Peter Cairns / 2020VISION / Red deer (Cervus elaphus) portrait in pine forest, Cairngorms NP, Highlands, Scotland, UK, April

Wild Wonders of Europe / Lesniewski / Portrait of a wild Carpathian Grey Wolf (Canis lupus lupus) in snow-bound woodland habitat. Bieszczady, Carpathian Mountains, Poland, December.

Fiona Rogers / Head portrait of mature male Proboscis Monkey (Nasalis larvatus) feeding on leaves. Bako National Park, Sarawak, Borneo, Malaysia, April 2010.

Axel Gomille / Portrait of an Indian Rhinoceros (Rhinoceros unicornis). Kaziranga National Park, India.

Pete Oxford / Huaorani man being shaved by his daughter. Gabaro Community, Yasuni National Park, Ecuador, June 2007. Model release #GA02 and #GA09.

Pete Oxford / A Huaorani man seen through leaves in the forest undergrowth. Gabaro Community, Yasuni National Park, Ecuador, June 2007. Model release #GA21.

Pete Oxford / Huaorani Indian woman with her pet Cobalt-winged Parakeet (Brotogeris cyanoptera). Gabaro Community, Yasuni National Park, Ecuador, June 2007. Model release #GA12.

Pete Oxford / Huaorani Indian and his child outside their forest dwelling. Bameno Community, Yasuni National Park, Ecuador, May 2007. Model release B#6.

Pete Oxford / Sword-billed Hummingbird (Ensifera ensifera), the only species of bird to have a bill longer than the rest of its body, approaching a flower. Yanacocha Reserve, Ecuador.

Pete Oxford / Portrait of an Emerald Glass Frog (Espadarana / Centrolenella prosoblepon). Captive. Chocó Region of northwest Ecuador.

Pete Oxford / Glass Frog (Espadarana callistomma / centrolenidae). Captive. Chocó Region of northwest Ecuador.

Pete Oxford / Imbabura Treefrog (Hypsiboas picturatus). Captive. Chocó Region of north west Ecuador.

Sandesh Kadur / Edwards Atlas Moth (Attacus edwardsii) defensive display. Bhutan, June.

Sandesh Kadur / Golden Langur (Trachypithecus / Presbytis geei) perching in a tree seen through dense foliage. Endangered. Assam, India, September.

Anup Shah / Female Proboscis monkey (Nasalis larvatus) carrying a baby under her belly and jumping. Bako National Park, Sarawak, Borneo, Malaysia, April 2010.

Anup Shah / Sub-mature male Proboscis Monkey (Nasalis larvatus) swinging from a liana. Bako National Park, Sarawak, Borneo, Malaysia, April 2010.

Jurgen Freund / Wonderpus (Wunderpus photogenicus) Indo-pacific.

Doug Perrine / RF- Reef manta ray (Manta birostris / alfredi) feeding on plankton, with unique pattern of underside spots, allowing individual identification, Hanifaru Bay, Hanifaru Lagoon, Baa Atoll, Maldives, Indi...

Doug Perrine / Sperm whale (Physeter macrocephalus) juvenile female aged about 6-11 years, Endangered Species, Commonwealth of Dominica, Caribbean, March

Doug Perrine / Reef manta rays (Manta alfredi formerly Manta birostris) vortex / cyclone feeding on plankton, Hanifaru Bay, Hanifaru Lagoon, Baa Atoll, Maldives, Indian Ocean, October

Jurgen Freund / Green turtles (Chelonia mydas) mating over coral reef, Sipadan Island, Sabah, Malaysia, June, Endangered species

Jurgen Freund / Massive barrel sponge (Xestospongia testudinaria) and diver. Tubbataha Reef National Marine Park, Palawan, Philippines, April 2009. Model released.

Jeff Rotman / Mattanza fishermen landing Giant Bluefun tuna (Thunnus thynnus) using a technique in which a maze of nets are set, leading to a central pool, Favignana, Italy, May / June Model released.

Jeff Rotman / Mattanza fishermen landing Giant Bluefun tuna (Thunnus thynnus) using a technique in which a maze of nets are set, leading to a central pool, Favignana, Italy, May / June Model released.

Jurgen Freund / Kite fisherman using a kite and fishing line. Skipjack tuna are a common catch. Sulawesi, Indonesia, November 2009.

Jurgen Freund / Kite fisherman using a kite and fishing line. Skipjack tuna are a common catch. Sulawesi, Indonesia, November 2009.

Doug Perrine / Researcher Guy Stevens photographs belly spot identification pattern of Reef manta ray (Manta alfredi formerly Manta birostris) feeding on plankton, Hanifaru Bay, Baa Atoll, Maldives, Indian Ocean, Oc...

Jurgen Freund / Fisherman collecting freshly blasted or dynamited schooling fish in the reef. Phillipines, April 2009.

Ernie Janes / Dromedary Camel (Camelus dromedarius) in the Erg Chebbi Dunes. Sahara Desert, Morocco, North Africa, March 2011.

Thomas Rabeil / Fennec Fox (Fennecus / Vulpes zerda) sitting in the entrance to its burrow. Dilia Achetinamou Niger, Africa.

Thomas Rabeil / Malpolon / False Cobra (Malpolon moilensis) expanding its hood in a defensive display. Termit Massif, Niger, Africa.

Thomas Rabeil / Portrait of a Spurred Tortoise (Geochelone sulcata). Termit Massif, Niger, Africa.

Ann & Steve Toon / Baby African elephants (Loxodonta africana) of various ages playing together, Addo national park, Eastern Cape, South Africa, January. Did you know? Elephants can tell the difference between different...

Pete Oxford / African Elephant (Loxodonta africana) baby standing by its mother's legs. Kruger National Park, South Africa, December.

Bernard Castelein / Asiatic Elephant (Elephas maximus) walking with its trunk in its mouth. Kaziranga National Park, Assam, India, February.

Axel Gomille / Indian / Asian / Spectacled Cobra (Naja naja) raising its hood in a threat display. Karnataka, India.

Nature Production / Two male Babirusa fighting (Babyrousa babyrussa) Sulawesi, Indonesia, vulnerable species

Bernard Castelein / Hog Deer (Cervus / Axis / Hyelaphus porcinus) crossing a stream. Kaziranga National Park, Assam, India, February.

Nature Production / Siberian tiger (Panthera tigris altaica) walking in snow in woodland, Gaivoron, Russia Endangered species

Axel Gomille / Sloth Bear (Melursus ursinus) mother and cubs with one riding on her back. Karnataka, India, March.

Axel Gomille / Sloth Bear (Melursus ursinus) cub playing with with mother's paw. Karnataka, India, March.

Axel Gomille / Sloth Bear (Melursus ursinus) mother with cub riding on her back. Karnataka, India, April.