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.

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...

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.

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.

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

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

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.

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.

Gabriel Rojo / Black caiman (Melanosuchus niger) on shore, Ibera Marshes, Corrientes Province, Argentina

Pal Hermansen / Aerial view of river and swans, South West Iceland, June 2014.

Denis-Huot / Lioness (Panthera leo) standing on fallen tree, silhouetted at sunset. Nakuru National Park, Kenya.

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

Denis-Huot / Cheetah (Acinonyx jubatus) female standing below dark storm clouds, Masai-Mara game reserve, Kenya.

Sven Zacek / Two Roe deer (Capreolus capreolus) sniffing each other in the snow, Vorumaa, Estonia, January. Winner of the Animal stories portfolio in the Melvita Nature Images Awards competition 2014.

Sven Zacek / Roe deer (Capreolus capreolus) in fog at sunset, Estonia, September. Nominated in the Melvita Nature Images Awards competition 2014.

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...

Steve O. Taylor (GHF) / Rock arch in the far north of Niger, 2005.

Michael D. Kern / Kaleidoscope pattern formed from picture of Johnstons Chameleon (Chamaeleo johnstoni) face and legs. Restricted for Editorial use until December 2015

Jabruson / Long-tailed Pangolin (Uromanis tetradactyla) unfurling itself from protective posture, close up of scales, Lokoue Bai. Odzala-Kokoua National Park, Republic of Congo

Jabruson / Long-tailed Pangolin (Uromanis tetradactyla) unfurling itself from protective posture, Lokoue Bai. Odzala-Kokoua National Park, Republic of Congo

Angelo Gandolfi / Yacare Caiman (Caiman yacare) with mouth open to keep cool, Pantanal, Brazil.