Alex Mustard / A diver explores Silfra Canyon, a deep fault filled with fresh water in the rift valley between the Eurasian and American tectonic plates at Thingvellir National Park, Iceland. May 2011. In this phot...

Stephen Dalton / Black witch moth (Ascalapha odorata) in flight, Venezuela. This large moth has a 7 inch wingspan. Wingscales being shed during flight.

Alex Mustard / Western clown anemonefish (Amphiprion ocellaris) poses with a large, dominant female behind. The clownfish in the foreground is probably a juvenile. Bitung, North Sulawesi, Indonesia. Lembeh Strait, M...

Georgette Douwma / Nudibranch (Chromodoris willani) with a scale worm. Lembeh Strait, North Sulawesi, Indonesia.

Emanuele Biggi / Peruvian Tarantula (Pamphobeteus sp.) and Humming Frog (Chiasmocleis royi) together, Los Amigos Biological Station, Madre de Dios, Amazonia, Peru. These species have a commensal relationship. The tara...

Suzi Eszterhas / Chinese pangolin (Manis pentadactyla), orphaned baby in arms of research assistant. Taipei Zoo, Taipei, Taiwan. 2015. Captive. Model released.

Chris & Monique Fallows / Long-beaked common dolphin (Delphinus capensis) breaching in front of large ship during sardine run, East London, South Africa, June.

Colin Varndell / Grass snake (Natrix natrix) Dorset, UK May

Pete Oxford / Whale Shark (Rhincodon typus) close up of spotted skin, with Golden trevally (Gnathanodon speciosus) Cenderawasih Bay, West Papua, Indonesia.

Pete Oxford / Whale shark (Rhincodon typus) and scuba divers seen from below, Cenderawasih Bay, West Papua. Indonesia.

Loic Poidevin / Grizzly bear (Ursus arctos horribilis) cubs with salmon, Katmai National Park, Alaska, August. Small reproduction only.

Bence Mate / White tailed sea eagle (Haliaeetus albicilla) and Hooded crow (Corvus cornix) in snow, Lake Csaj, Kiskunsagi National Park, Hungary. January.

Wim van den Heever / Blue wildebeest (Connochaetes taurinus) herd silhouetted against the rising sun with clouds in the background. Greater Kruger National Park, South Africa

Ben Hall / Marine Iguana (Amblyrhynchus cristatus) on rock with lava lizard sitting on its head, Galapagos Islands, May.

Ben Hall / Marine iguana (Amblyrhynchus cristatus) on rock taken with slow shutter speed to show motion in the water, Galapagos islands, May.

Juergen Freund / Man moving Grouper fish between fish pens, Tampakan, Kudat, Sabah, Borneo. June 2009. Second Place in the Portfolio Award of the Terre Sauvage Nature Images Awards Competition 2015.

Sven Zacek / Ural owl (Strix uralensis) perching on an Apsen tree during the blue hour of dawn, Tartumaa, Estonia, April.

Mark Hamblin / Mountain hare (Lepus timidus) in white winter coat stretching - in snowy habitat, Scotland. Highly Commended in the Mammals category of the GDT European Photographer of the Year Competition 2015.

John Cancalosi / American bullfrog (Lithobates catesbeianus) swimming near Water lilies (Nymphaea sp) Washington DC, USA. July.

Juan Carlos Munoz / Honeybee (Apis melifera) visiting Lavender (Lavendula angustifolia) in lavender fields, Valensole Plateau, Alpes Haute Provence, France, July.

Juan Carlos Munoz / Aerial view of waterfall on the coastline of Corcovado National Park, Osa Peninsula, Puntarenas Province, Costa Rica. December 2014.

Sergey Gorshkov / Gemsbok (Oryx gazella) in sand dunes, Namibia. Finalist in the Mammals Category of the Wildlife Photographer of the Year Awards (WPOY) Competition 2015.

Neil Aldridge / Urban Red fox (Vulpes vulpes) searching for food near bins in a courtyard at night, West London, United Kingdom, May 2014. Finalist in the Urban category of the Wildlife Photographer of the Year Awar...

Cyril Ruoso / Fig tree (Ficus sp) in rainforest, Bukit Barisan National Park, Sumatra, Indonesia.

Bruno D'Amicis / Sand viper (Cerastes vipera) sidewinding on sand dunes. Grand Erg Oriental, Kebili Governorate. Tunisia.

Dong Lei / Crocodile newt (Tylototriton verrucosus) Gaoligong Mountain National Nature Reserve, Tengchong county, Yunnan Province, China. May.

Jack Dykinga / Lightning storm with rainbow over Saguaro cactus (Carnegiea gigantea) Avra Valley, Saguaro National Park, Tucson Mountains, Arizona, USA, August 2015. Long exposure with lightning trigger.

Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) in urban environment Cardiff, UK

Pete Oxford / Chilean flamingo (Phoenicopterus chilensis) in Lago Azul with Torres del Paine, Torres del Paine National Park, Patagonia, Chile.

Andy Rouse / Galapagos land iguana (Conolophus subcristatus) walking towards camera, Urbina Bay, Isabela Island, Galapagos.

Andy Rouse / Galapagos land iguana (Conolophus subcristatus) feeding, Urbina Bay, Isabela Island, Galapagos.

Juan Manuel Borrero / Pearl cichlid (Geophagus brasiliensis) captive, occurs in Brazil and Uruguay.

Andrew Parkinson / Brown hare (Lepus europaeus) adult running in wintery landscape. Derbyshire, UK, January.

Juan Carlos Munoz / Tourists looking down onto underground stream, from illuminated pathway, Skocjan Caves, Green Karst, Slovenia, October 2014.

Chris & Monique Fallows / Long-beaked common dolphin (Delphinus capensis) school off the coast of False Bay, with dramatic sky, South Africa, May.

Onne van der Wal / Tug escorting tanker out of the port of Charleston, towards the Ravenel Bridge, South Carolina, USA. All non-editorial uses must be cleared individually.

Juergen Freund / Dingo (Canis lupus dingo) at Devils Marbles, Northern Territory, Australia.

Ole Jorgen Liodden / Boy on skis going up slope, framed by snow laden tree, Norway, February 2014.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) walking across vast ice floe, Spitsbergen, Svalbard, July 2013.

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) diving to feed on algae, Sombrero Chino Islet, Santiago Island, Galapagos, Ecuador, May.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) stranded on island, with full moon above, north of Nordaustlandet, Svalbard, Norway, September.

Michel Roggo / Iceberg in the sea outside the Kangia Ilulissat Icefjord. Iceberg from the Sermeg Kujalleg Glacier, UNESCO World Heritage Site, Kalaallit Nunaat, Greenland, August 2014. Photographed for The Freshwate...

Steven Kazlowski / Photographer in front of Northern lights / Aurora borealis glowing brightly over the frozen eastern Beaufort Sea, Arctic National Wildlife Refuge, Alaska Model released.

Orsolya Haarberg / High angle view of person walking on frozen lake of cracked ice. Lofoten Isands, Norway. January. Highly commended in the Landscape Category of the Oasis Photography Competition 2017. Highly commended...

Floris van Breugel / Bald eagle (Haliaeetus leucocephalus) flying in front of the massive wall of ice, Margerie Glacier, Glacier Bay National Park, Alaska, USA, August 2014.

Denis-Huot / Male black rhinoceros (Diceros bicornis) silhouetted against clouds, Masai-Mara Game Reserve, Kenya. March.

Denis-Huot / Bushfires in dry season on the Isuria escarpment, Masai-Mara Game Reserve, Kenya. October 2007.