Morley Read / Millipede (Diplopoda) walking along a branch, Orellana Province, Ecuador. (non-ex)

Morley Read / Millipede (Diplopoda) walking along a branch, Orellana Province, Ecuador. (non-ex)

Danny Green / Polar bear (Ursus maritimus) female and cubs, one cub walking up slope of ice in foreground. Svalbard, Norway, July.

Oscar Dewhurst / Fallow deer (Dama dama) walking across frost-covered playing fields at dawn, with tower blocks of London in the background. Richmond Park, London, UK. December

Jordi Chias / Gentoo penguins (Pygoscelis papua) walking in line, returning to nesting area, Port Charcot, Antarctic Peninsula, Antarctica.

Jordi Chias / Gentoo penguins (Pygoscelis papua) walking in line, returning to nesting area, Port Charcot, Antarctic Peninsula, Antarctica.

Jordi Chias / Gentoo penguins (Pygoscelis papua) walking in line, returning to nesting area, Port Charcot, Antarctic Peninsula, Antarctica.

John Shaw / King penguins (Aptenodytes patagonicus) walking in line on a windy beach. Sanders Island, Falklands. November.

Bernard Castelein / Rhesus macaque (Macaca mulatta), mixed group of female and juveniles, walking along a track, Keoladeo National Park, Bharatpur, India

Jami Tarris / African Elephant (Loxodonta africana) herd on savanna, Mount Kilimanjaro, Amboseli National Park, Kenya

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) group walking infront of iceberg, Atka Bay, Queen Maud Land, Antarctica. October.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri), four journeying across sea ice to feed young. Atka Bay, Antarctica. August.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) group of brooding males amongst drifting snow. Atka Bay, Antarctica. August.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) males in breeding colony incubating eggs, huddling during winter storm. Penguins on outside repositioning themselves to gain protection from weather. Atka Bay, A...

Stefan Christmann / Emperor penguin (Aptenodytes forsteri), breeding colony with individuals in foreground walking to / from open water. Atka Bay, Antarctica. September 2017.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri), three in a row, walking through drifting snow to feed young. Atka Bay, Antarctica. September.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) group clambering up slope during journey to bring back food for young. Atka Bay, Antarctica. September.

Claudio Contreras / Caribbean Flamingo (Phoenicopterus ruber) chick group walking around the breeding colony, Ria Lagartos Biosphere Reserve, Yucatan Peninsula, Mexico, June, Finalist in the Portfolio Category of the Ter...

Frederique Olivier / Wide-angle shot of a group of Emperor penguin (Aptenodytes forsteri) chicks walking on sea ice, Adelie Land, Antarctica, January.

Frederique Olivier / Emperor penguins (Aptenodytes forsteri) walking in blizzard, Adelie Land, Antarctica, January.

Frederique Olivier / Emperor penguins (Aptenodytes forsteri) walking and tobogganing in blizzard, Adelie Land, Antarctica, January.

Frederique Olivier / Wide angle shot of Adelie penguins (Pygoscelis adeliae) walking on sea ice, Adelie Land, Antarctica, January.

Christophe Courteau / Ostriches (Struthio camelus) running in the distance in a mirage, Sossusvlei, Namib-Nauckluft National Park, Namib Desert, Namibia.

Peter Bassett / King penguins (Aptenodytes patagonicus) in a breeding colony, with mountains in the background, Salisbury Plain, South Georgia.

Peter Bassett / King penguins (Aptenodytes patagonicus) walking towards and entering the sea near their breeding colony, Salisbury Plain, South Georgia.

Tui De Roy / Snares Crested penguin (Eudyptes robustus) group walking up granite slope into Oleander forest, Station Point colony. Snares Island, New Zealand Sub-Antarctic Islands.

Steven Kazlowski / Polar bear (Ursus maritimus) mother with two juveniles walking along ice edge during autumn freeze up, Beaufort Sea, off Arctic coast, Alaska

Frederique Olivier / Group of Adelie penguins (Pygoscelis adeliae) walking away from the camera on sea ice at sunset, with one solitary penguin in the foreground, Antarctica.

Ingo Arndt / Christmas Island Red Crabs (Gecarcoidea natalis) crossing road in huge numbers during annual migration, Christmas Island, Indian Ocean, Australian Territory

Danny Green / Bison (Bison bison) herd walking in line in snow, Yellowstone National Park, Wyoming, USA, February

Ingo Arndt / Cheetah (Acinonyx jubatus) male walking by Burchell's Zebra (Equus burchellii) herd, Masai Mara, Kenya

Anup Shah / Southern plains grey langur / Hanuman langurs (Semnopithecus dussumieri) walking along a ledge . Jodhpur, Rajasthan, India. March.

Hiroya Minakuchi / African Elephant (Loxodonta africana) herd walking, Amboseli National Park, Kenya

Eric Baccega / African elephant (Loxodonta africana) herd with calves, walking in procession to a waterhole in sand storm, Etosha National Park, Namibia, Africa

Wim van den Heever / Gemsbok (Oryx gazella) viewed from above, Namib Desert, Namibia.

Suzi Eszterhas / Brown Bear (Ursus arctos) mother and 3-4 month cubs foraging for clams, Katmai National Park, Alaska, USA. June.

Sharon Heald / African elephant (Loxodonta africana) herd silhouetted at sunset, Chobe National Park, Botswana.

Arne Hodalic / Nenet herdsman with Reindeer (Rangifer tarandus) during summer migration, Yamal Peninsula, Russia. May.

Eric Baccega / Salt caravans made up of hundreds of Dromedary camels (Camelus dromedarius) and their pullers transporting salt slabs cut from Lake Assale to the Mekele Market, Danakil depression, Afar region, Ethiop...

Andy Rouse / Bengal tiger (Panthera tigris tigris) with tourists watching from cars, Ranthambore, India

Denis-Huot / Masai giraffe (Giraffa cameleopardalis tippelskirchi) herd walking across savanna in dry season, Masai-Mara Game Reserve, Kenya

Ole Jorgen Liodden / Herd of Moose (Alces alces) following in line in each other's tracks, aerial view, Valdres, Norway, February.

Ole Jorgen Liodden / King penguins (Aptenodytes patagonicus) walking in habitat, with mountains, South Georgia, November 2008.

Frederique Olivier / Adelie penguins (Pygoscelis adeliae) in front of French Icebreaker L'Astrolabe, on edge of the fast ice off Dumont D'Urville station, Antarctica. December 2014.

Theo Webb / Bengal tiger (Panthera tigris) cubs following their mother, Bandhavgarh National Park, India.

Alex Hyde / Red deer herd (Cervus elaphus) moving over mountain ridge in heavy snow. Cairngorms National Park, Scotland. January.

Andy Rouse / Bengal tiger (Panthera tigris tigris) female 'T19 Krishna' leading 11 month cubs, Ranthambhore National Park, India.

Steven Kazlowski / Polar bear (Ursus maritimus) sow with two juveniles walk along the ice edge during autumn freeze up, Beaufort Sea, off Arctic coast, Alaska

Denis-Huot / Aerial view of African elephants (Loxodonta africana) and African buffalo (Syncerus caffer) at a water hole during the dry season, Tsavo East National Park, Kenya. October.

Denis-Huot / African elephant (Loxodonta africana) herd walking in the plains during the dry season, Masai-Mara Game Reserve, Kenya. October.

Tui De Roy / Little blue / fairy penguin (Eudyptula minor) walking on pathway to nesting burrows, Neck Game Reserve, Bruny Island, Tasmania, Australia, December.

Andy Trowbridge / Four Yellow-eyed penguins (Megadyptes antipodes) walking up a sand dune towards their nests, Otago Peninsula, Otago, South Island, New Zealand. September. Endangered Species.

Mark Jones / Snares-crested penguin (Eudyptes robustus) group climbing steep route to colony. Snares Island, New Zealand Subantarctic Islands. Endemic. Vulnerable species.

Hermann Brehm / Crowned crane (Balearica regulorum) with chicks, Ndutu, Tanzania.

Alex Hyde / Long exposure of light trail from bioluminescent click beetle (Pyrophorus sp) walking on ground at night. Danum Valley Sabah, Borneo.

Thomas Marent / Indian Rhinoceros (Rhinoceros unicornis) crossing road near tourists, Kaziranga National Park, Assam, India

Staffan Widstrand / American Bison (Bison bison) in habitat, Grand Teton National Park, Wyoming, USA, October.

Nick Garbutt / Male Southern Lapwings (Vanellus chilensis) displaying in grasslands, Chapada dos Guimaraes, Brazil, South America.

Frederique Olivier / Adelie penguins (Pygoscelis adeliae) travelling to the ice edge to feed, Antarctica.

Frederique Olivier / Adelie penguin (Pygoscelis adeliae) group, Antarctica.

David Noton / People crossing a footbridge over the Nam Khan River, Luang Prabang, Laos, March 2009.

Denis-Huot / Wildebeest (Connochaetes taurinus) herd below stormy sky during migration, Masai-Mara game reserve, Kenya.

Denis-Huot / Aerial view of Elephants (Loxodonta africana) at watering hole in the rainy season, Tsavo East National Park, Kenya.

Denis-Huot / Masai giraffes (Giraffa camelopardalis tippelskirchi) silhouetted at sunrise, Masai-Mara game reserve, Kenya.

Sam Hobson / Fallow deer (Dama dama) herd walking down road. London, UK. January.

Sven Zacek / Aerial view of three Roe deer (Capreolus capreolus) walking in line along trail in snow, with long shadows before sunset, Estonia, May. Winner of the Mammals category and the Animal stories portfolio...

Ernie Janes / Abstract photo of Tower Bridge, with blurred motion red bus, London, June 2013. Digitally manipulated.

Anup Shah / Lion (Panthera leo) cub aged about 2 years approaching with curiosity - remote wide angle perspective . Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Anup Shah / African elephant (Loxodonta africana) herd at waterhole with calves seen between adults legs. Masai Mara National Reserve, Kenya. Taken with remote wide angle camera.

Bruno D'Amicis / Apennine chamois (Rupicapra pyrenaica ornata) female and kids silhouetted against the waters of Adriatic Sea at sunrise. Endemic to the Apennine mountains. Majella National Park. Abruzzo, Italy, July.

Christophe Courteau / Tourists and guide using snowshoes on an ecotourism trekking holiday, Svalbard, Norway, June, 2012. Model released.

Mike Wilkes / Burchell's zebra (Equus quagga burchellii) walking in single file, Ngorongoro Crater,Tanzania

Mark MacEwen / Wedge-tailed Shearwaters (Puffinus pacificus) at night, Heron Island, southern Great Barrier Reef, Queensland, Australia. Taken with infra-red camera.

Staffan Widstrand,Staffan Widstrand / Water buffalo (Bubalus bubalis) Pulicat Lake, Tamil Nadu, India, February 2013.

Ernie Janes,Ernie Janes / Walkers on footpath in farmland from Wiveton Downs, North Norfolk, UK, March

Ernie Janes / Spring lambs in meadow, UK, April

Kevin Schafer / Black-footed Penguin (Spheniscus demersus) group walking near huge stones, Boulders Beach, Cape Peninsula, South Africa

Cyril Ruoso / Ring-tailed Lemur (Lemur catta) troop walking down dirt road, vulnerable, Berenty Private Reserve, Madagascar

Eric Dragesco,Eric Dragesco / Herd of Tibetan Wild Asses / Kiang (Equus kiang) ChangThang, Tso Kar lake, at altitude of 4600m, Ladakh, India, October 2012

Staffan Widstrand / Wild Wonders of China / Black-necked crane (Grus nigricollis) in black and white silhoutte. Napa Lake, Yunnan province, China. Vulnerable species.

David Tipling / Visitors viewing Grey Seal colony at Winterton Dunes, Norfolk, December 2010

Juan Carlos Munoz,Juan Carlos Munoz / Hikers climbing Mount Etna in the mist, Etna, Sicily, Italy, October 2007

Bence Mate / Leaf cutter ants (Atta cephalotes) carrying sections of leaves, to be used for cultivating nutritious fungi, Santa Rita, Costa Rica

Andy Rouse,Andy Rouse / African Elephant (Loxodonta africana) breeding herd in rainstorm during migration. Maasai Mara, Kenya, Africa, August.

Denis-Huot,Denis-Huot / Lion (Panthera leo) pride lying in long grass watching elephants (Loxodonta africana), Masai-Mara Game Reserve, Kenya. Vulnerable species.

Axel Gomille / Zebu cattle (Bos primigenius indicus) holy cow, walking past Sadhu or holy man, Varanasi, India

Christophe Courteau,Christophe Courteau / Villagers walking along a road during a heavy rain shower, Virunga National Park, North Kivu Province, Democratic Republic of the Congo, August 2010.

David Tipling / Gentoo Penguins (Pygoscelis papua) group walking, Sea Lion Island, Falklands, November

Gavin Hellier / The restored Souq Waqif with mud rendered shops and exposed timber beams at dusk, Doha, Qatar, Arabian Peninsula 2011. No release available.

Gavin Hellier / Khao San Road at dusk, Banglamphu, Bangkok, Thailand, 2010. No release available.

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

Claudio Contreras / American Flamingo (Phoenicopterus ruber) juveniles following adults, Ria Lagartos Biosphere Reserve, Yucatan Peninsula, Mexico, August.

Erlend Haarberg / Tourists walking on Blahnjukur Volcano, Rhyolite mountains, Landmannalaugar, Iceland, August 2008

Nick Turner / Family walking up steps from Durdle Door Beach onto the South West Coast Path National Trail, Dorset, UK, May 2009.

Chadden Hunter / King penguins (Aptenodytes patagonicus) walk along beach, South Georgia. Taken on location for BBC Frozen Planet series, 2008

Chadden Hunter / King penguins (Aptenodytes patagonicus) heading out to sea, crossing tidal surf to feed in the open seas, South Georgia. Taken on location for BBC Frozen Planet series, 2008