Matthew Maran / Indian rhinoceros (Rhinoceros unicornis) covered in mud in long grass, with Mynah birds (Acridotheres sp) perched along its back, Kaziranga NP, Assam, India

Mark Carwardine / Southern white rhinoceros (Ceratotherium simum simum) with rainbow and storm clouds. Ol Pejeta Conservancy, Kenya, 2009. Threatened species.

Matthew Maran / Steller's Sealion (Eumetopias jubata) stampede into the water. Clayoquot Sound, Vancouver Island, Canada, March.

Anup Shah / Bornean Orangutan (Pongo pygmaeus wurmbii) female 'Tata' and her unnamed baby aged 2-3 months portrait. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia. June 2010. Reh...

Eric Baccega / Giant otter (Pteronura brasiliensis) swimming, captive, from Pantanal, Brazil, IUCN Endangered

Matthew Maran / Sea otter (Enhydra lutris) resting at the sea surface with paws in the air. Barkley Sound, Vancouver Island, Canada, August.

Nuno Sa / Whale Shark (Rhincodon typus) accompanied by Pilot Fish (Naucrates ductor) and Remora. The biggest fish in the world has only started to visit the Azores in the past three years due to water temperatu...

Alex Mustard / 2020VISION / Basking shark (Cetorhinus maximus) feeding on plankton in the surface waters around the island of Coll, Inner Hebrides, Scotland, UK, June. 2020VISION Book Plate. Did you know? The largest Basking sha...

Tony Heald / African elephant (Loxodonta africana) at sunset by water, Etosha National Park, Namibia October

Denis-Huot / Crowned crane (Balearica regulorum gibbericeps) portrait, Masai-Mara Game Reserve, Kenya

Tui De Roy / Waved albatross (Phoebastria irrorata) in flight. Punta Cevallos, Espanola (Hood) Island, Galapagos, Ecuador, May.

Ole Jorgen Liodden / Blue Whale (Balaenoptera musculus) blowing with mountains in the background. Spitsbergen, Svalbard, August.

Juan Carlos Munoz / Aerial view of Southern right whale (Eubalaena australis / Balaena glacialis australis) mother and calf. Valdes Peninsula, Patagonia, Argentina, Oct 2008

Inaki Relanzon / Hawksbill turtle (Eretmochelys imbricata) swimming underwater, Nosy Be, North Madagascar.

Solvin Zankl / Baby Olive Ridley sea turtle (Lepidochelys olivacea) struggles against the swell to swim away from the beach where it hatched, Ostional, Costa Rica. October. Winner of the Underwater category of the G...

Inaki Relanzon / Hawksbill turtle (Eretmochelys imbricata) in shallow water. Nosy Be, north Madagascar, Africa.

Doug Perrine / Green sea turtle (Chelonia mydas) being cleaned of algae by Yellow tangs / surgeonfish (Zebrasoma flavescens), Puako, Kona, Hawaii, USA, June, Endangered species

Jordi Chias / Green Turtle, (Chelonia mydas), Swimming over volcanic sandy bottom, Armenime cove, South Tenerife coast, Canary Islands, Spain, Atlantic Ocean, May 2011, Commended in Wildlife Photographer of the Yea...

Claudio Contreras / Green spiny landfrog (Eleutherodactylus nortoni), critically endangered, Haiti, captive

Chris Packham / Sand lizard male (Lacerta agilis) UK

Steven Kazlowski / Polar bear (Ursus maritimus) adult walking over newly formed pack ice during fall freeze up, 1002 area of the Arctic National Wildlife Refuge, North Slope, Alaska, USA

Danny Green / Tiger (Panthera tigris tigris) female portrait. Endangered. Bandhavgarh, India, November.

XI ZHINONG / Tibetan antelope (Pantholops hodgsoni) male with female, grazing, Kekexili, Qinghai, Tibetan Plateau, China, December

Tony Heald / African Wild Dog (Lycaon pictus) pack passing infront of large African elephant (Loxodonta africana) Mana Pools National Park, Zimbabwe October 2012

Suzi Eszterhas / Southern sea otters (Enhydra lutris) trying to keep paws dry for thermoregulation by holding above water surface, Monterey Bay, California, USA

Ann & Steve Toon / African elephants (Loxodonta africana) large family group on migration, Amboseli National Park, Kenya

Graham Eaton / Leatherback Turtle Hatchling (Dermochelys coriacea) crossing a beach towards the sea, Cayenne, French Guiana, July

David Tipling / Red-crowned Cranes (Grus japonensis) displaying at dawn Hokkaido, Japan, February. Did you know? Red crowned cranes mate for life.

Michael D. Kern / Zoo Atlanta / Lemur leaf frog (Hylomantis lemur) captive, Critically endangered, from Central America

Ernie Janes / Bengal Tiger (Panthera tigris tigris) captive, with leaves digitally added.

Juan Carlos Munoz / Giant panda (Ailuropoda melanoleuca) at the top of a tree, Sichuan, China, January

Bert Willaert / Mocha Island Ground Frog (Eupsophus insularis) Mocha Island, Chile, December. Critically Endangered species

Cheryl-Samantha Owen / Aldabra giant tortoise (Geochelone gigantea) walking along the sea shore, Aldabra Atoll, Seychelles, March

Alex Mustard / Whale shark (Rhincodon typus) feeding on fish eggs (visible as white blobs) at the surface in calm weather, with snorkeller behind. Isla Mujeres, Quintana Roo, Yucatan Peninsular, Mexico. Caribbean Se...

Chris & Monique Fallows / Smooth hammerhead (Sphyrna zygaena) Cape Point, South Africa.

Chris & Monique Fallows / African penguin (Spheniscus demersus) diving underwater, False Bay, Cape Town, South Africa.

Chris & Monique Fallows / African penguins (Spheniscus demersus) diving underwater, False Bay, Cape Town, South Africa.

Neil Aldridge / African wild dog (Lycaon pictus) resting in thick mopane bush on Venetia Limpopo Nature Reserve, South Africa

Eric Baccega / Polar bear (Ursus maritimus) female coming out the den with one three month cub. Wapusk National Park, Churchill, Manitoba, Canada, March.

XI ZHINONG / Tibetan antelope (Pantholops hodgsonii) herd in the early morning with a low moon, Kekexili, Qinghai, Tibetan plateau, China, January

Doug Perrine / Green sea turtle (Chelonia mydas) being cleaned by yellow tangs (Zebrasoma flavescens) at a cleaning station where the turtles are groomed by the fish in a mutualistic, symbiotic relationship, Puako,...

Franco Banfi / Tail of Southern right whale (Eubalaena australis) at sunset, Golfo Nuevo, Peninsula Valdes, UNESCO Natural World Heritage Site, Chubut, Patagonia, Argentina, Atlantic Ocean, October

Danny Green / Polar Bear (Ursus maritimus) standing on ice, Svalbard, Norway, July. Bookplate from Danny Green's 'The Long Journey North'

Danny Green / Polar Bear (Ursus maritimus) on ice, with mountains in the background, Svalbard, Norway, July. Bookplate from Danny Green's 'The Long Journey North'

Aflo / Giant panda (Ailuropoda melanoleuca) climbing on rock, Chengdu Panda Breeding and Research Center, China. Property released.

Aflo / Giant Panda (Ailuropoda melanoleuca) lying on back resting in grass, Chengdu Panda Breeding and Research Center, China. Property released.

Edwin Giesbers / Siberian tiger (Panthera tigris altaica) walking in snow, captive

Oriol Alamany / Wild Iberian Lynx (Lynx pardinus) male, Sierra de Andujar Natural Park, Jaen, Andalucia, Spain

David Pattyn / Dalmatian Pelican (Pelecanus crispus) pelicans resting on rocks and preening their plumage. Lake Kerkini, Greece. February

Michele Westmorland / Scalloped hammerhead shark (Sphyrna lewini) shoal, Galapagos Islands.

Eric Baccega / African elephant (Loxodonta africana) Masai Mara National Reserve, Kenya, Africa.

Anup Shah / African elephants (Loxodonta africana) drinking at a waterhole. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Eric Baccega / Polar bear (Ursus maritimus) female with her 3 months cub, soon after emerging from their den in March. Wapusk National Park, Churchill, Manitoba, Canada.