Ross Hoddinott / Common blue damselfly (Enallagma cyathigerum), close up portrait, Broxwater, Cornwall, UK. July.

Lorraine Bennery / Fossa (Cryptoprocta ferox) resting, Kirindy Forest Private Reserve, Madagascar,Vulnerable, endemic.

Klein & Hubert / African lion (Panthera leo) portrait, South Africa

Klein & Hubert / Hippo (Hippopotamus amphibius) walking to the Luangwa River at sunrise, Luangwa National Park, Zambia.

Klein & Hubert / European Hamster (Cricetus cricetus) standing next to burrow. Alsace, France. September.

Robin Chittenden / Tufted grey langur (Semnopithecus priam priam) baby, Sri Lanka.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) brooding chick aged 1-3 weeks, portrait. Atka Bay, Antarctica. August.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) chick aged 1-3 weeks on adult's feet, portrait. Atka Bay, Antarctica. August.

Alex Hyde / Southern Elephant Seal bull (Mirounga leonina) close up portrait, King Haakon Bay, South Georgia. November.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) chick aged six to eight weeks stretching whilst on brooding parent's feet. Adult looking down at chick. Atka Bay, Antarctica. September.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri) chick aged six to eight weeks, portrait. Atka Bay, Antarctica. September.

Stefan Christmann / Emperor penguin (Aptenodytes forsteri), two chicks aged six to eight weeks huddling together. Atka Bay, Antarctica. September.

Klein & Hubert / Common hedgehog (Erinaceus europaeus) hoglet aged five days, eyes not yet open

Axel Gomille / Wolf (Canis lupus), in meadow, Saxony-Anhalt, Germany

Axel Gomille / Wolf (Canis lupus), in meadow, Saxony-Anhalt, Germany

Tim Laman / Tapanuli orangutan (Pongo tapanuliensis) Togus, adult flanged male, Batang Toru Forest. Sumatran Orangutan Conservation Project, North Sumatran Province, Indonesia.

Tim Laman / Tapanuli Orangutan (Pongo tapanuliensis). Togus, adult flanged male. Batang Toru Forest, Sumatran Orangutan Conservation Project, North Sumatran Province, Indonesia.

Andy Rouse / Jaguar (Panthera onca) resting against tree on riverbank, Pantanal, Brazil

Anup Shah / Olive baboon (Papio anubis) male approaching with curiosity - remote camera. Masai Mara National Reserve, Kenya.

Will Burrard-Lucas / Young male melanistic leopard (Panthera pardus), Laikipia Wilderness Camp, Kenya. Photographed with a camera trap.

Sven Zacek / Roe deer (Capreolus capreolus) young buck, portrait. Karula National Park, Valgamaa, Southern Estonia. June.

Klein & Hubert / Hippopotamus (Hippopotamus amphibius) in river - portrait, Luangwa National Park, Zambia

Klein & Hubert / Hippopotamus (Hippopotamus amphibius) standing in water the Luangwa River at sunrise, Luangwa National Park, Zambia

Shane Gross / Cuban crocodile (Crocodylus rhombifer) in a cenote in Cienaga de Zapata National Park. Cuba. Critically endangered species.

Shane Gross / Cuban crocodile (Crocodylus rhombifer) in a cenote in Cienaga de Zapata National Park. Cuba. Critically endangered species.

Doug Gimesy / Platypus (Ornithorhynchus anatinus) just released onto a log in Little Yarra River, Yarra Junction, Victoria, Australia. April 2018. Controlled conditions.

Doug Gimesy / Platypus (Ornithorhynchus anatinus), released onto a log in Little Yarra River, Yarra junction, Victoria, Australia. Photographed under controlled conditions. April 2018.

Enrique Lopez-Tapia / Himalayan marmot (Marmota himalayana). Chantang Wildlife Sanctuary. Ladakh, India,

Tui De Roy / Western Santa Cruz giant tortoise (Chelonoidis porteri) feeding on grass, El Chato II, Highlands, Santa Cruz Island, Galapagos

Tui De Roy / Western Santa Cruz giant tortoise (Chelonoidis porteri) portrait, Highlands, Santa Cruz Island, Galapagos

Tui De Roy / Marine iguana (Amblyrhynchus cristatus) peering over rocks, Punta Espinosa, Fernandina Island, Galapagos

Remi Masson / Large Pike (Esox lucius) more than a meter long, resting on a lake bed, Lake Neuchatel, Switzerland. June.

Alex Mustard / Tiger cardinalfish (Cheilodipterus macrodon) male mouth brooding a clutch of eggs behind his sharp teeth. Gubal Island, Egypt. Strait Of Gubal, Red Sea.

Luke Massey / Seven banded armadillo (Dasypus septemcinctus) Pantanal, Brazil.

Paul Williams / Sumatran tiger (Panthera tigris tigris / Panthera tigris altaica) close up portrait, captive.

Erlend Haarberg / Red squirrel (Sciurus vulgaris) hiding in a tree trunk, Klaebu, Norway, September.

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) female with extremely long tusks, Tsavo Conservation Area, Kenya. Taken with a remote camera buggy / BeetleCam. Editorial use only. Other...

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) female with extremely long tusks, Tsavo Conservation Area, Kenya. Taken with a remote camera buggy / BeetleCam. Editorial use only. Other...

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) bull with extremely long tusks, Tsavo Conservation Area, Kenya. Taken with a remote camera buggy / BeetleCam. Editorial use only. Other u...

Pedro Narra / Little owl (Athene noctua) Sado Estuary, Portugal. June

Pedro Narra / Barn Swallow (Hirundo rustica) in flight. Portugal, Europe

Bence Mate / European roller (Coracias garrulus) peering out of nest with feather, Lake Csaj, Pusztaszer, Kiskunsagi National Park, Hungary, February.

Christophe Courteau / Mountain gorilla (Gorilla beringei beringei) female with baby, portrait. Volcanoes National Park, Rwanda.

Tony Wu / Sperm whale (Physeter macrocephalus) mature female, Dominica.

David Tipling / Fieldfare (Turdus pilaris) in garden in freezing weather with snow on the ground Norfolk, England, UK. february

David Tipling / King penguin (Aptenodytes patagonicus) Trollheim South Georgia, January.

Magnus Lundgren / Wild Wonders of China / Stellar rockskipper (Entomacrodus stellifer) hiding in a barnacle. Sai Kung East Country Park, Hong Kong, China.