Alex Mustard / Atlantic spotted dolphin (Stenella frontalis) mother and young swimming over a shallow, sandy seabed. The adults are spotted and the younsters are plain coloured. Great Bahama Bank, North Bimini, Baha...

Jack Dykinga / Frost damaged saguaro cactus (Carnegiea gigantea) South Maricopa Mountains Wilderness, Arizona, USA, January. Finalist in the Plants and Fungi Category of the Wildlife Photographer of the Year Awards...

Nick Garbutt / Montane Glass Frog (Centrolenella ilex) inside curled leaf. Mid-altitude rainforest, Bosque de Paz, Pacific slope, Costa Rica, Central America.

Alex Mustard / Whale shark (Rhincodon typus) mouth open feeding at the surface, Isla Mujeres, Yucatan Peninsular, Mexico. Caribbean Sea.

Guy Edwardes / Valeroi's glass frog (Hyalinobatrachium Valerioi) on underside of a leaf, Costa Rica.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) and meandering footprints, Svalbard, Norway

Bence Mate / African elephant (Loxodonta africana) at waterhole at night, Mkuze, South Africa Third place in the Nature Portfolio category of the World Press Photo Awards 2017.

Emanuele Biggi / Peringuey's adder (Bitis peringueyi) sidewinding in Namib desert, Namibia.

Theo Bosboom / Floating sweet-grass (Glyceria fluitans) in lake, Bjornlandet National Park, North Sweden. Finalist in the Plants and Fungi category of the Wildlife Photographer of the Year Awards (WPOY) Competition...

Phil Savoie / Swift (Apus apus) flock screaming in flight against blue sky and clouds, Monmouthshire, Wales, UK, July.

Pal Hermansen / Family on small island, to search for eider nests. Lanan, Vega UNESCO World Heritage Site, Northern Norway, July 2014. Highly commended in the Man and Nature Category of Terre Sauvage Nature Images A...

Hougaard Malan / Dendritic water pattern resembling a tree in Deadvlei, Sossuvlei, Namib-Naukluft Park, Namibia. February 2011.

David Pattyn / Trees in Hautes Fagnes Nature Reserve in winter after snowfall. This area - Noir Flohay was burnt a few years ago and some trees are still blackened, Hautes Fagnes, Belgian Ardennes, Belgium, February...

Sandra Bartocha / Liverwort (Hepatica nobilis), Mon, Denmark, March.

Ross Hoddinott / Wood anemone flower (Anemone nemorosa), RHS Rosemoor, near Great Torrington, Devon, UK. April 2017.

Markus Varesvuo / Japanese / Red-crowned crane (Grus japonicus) one coming into land, Hokkaido Japan February

Andy Rouse / Bengal tiger (Panthera tigris) tigress 'Noor' peering from behind a tree , Ranthambhore, India

Guy Edwardes / Ghost glass frog (Sachatamia ilex), Costa Rica.

Eric Baccega / Whale headed / Shoebill (Balaeniceps rex) vocalising. Swamps of Mabamba, Lake Victoria, Uganda.

Stephen Dalton / Morgan horse with mouth open, yawning against black background.

Ross Hoddinott / Harvest mice (Micromys minutus) on grass stems, Devon, UK. July 2016. Captive.

Emanuele Biggi / Weaver ants (Oecophylla smaragdina) building nest by gluing leaves together with silk, Sabah, Malaysian Borneo.

Cyril Ruoso / Feral Horse (Equus caballus) fight between stallions during mating season. Namib-Naukluft National Park, Namibia.

Oriol Alamany / Dingo (Canis lupus dingo) fighting on a beach. Fraser Island UNESCO World Heritage Site. Queensland, Australia, November.

Ann & Steve Toon / Impala (Aepyceros melampus) with redbilled oxpecker (Buphagus erythrorhynchus), Kruger National Park, South Africa.

Tony Wu / Humpback whale (Megaptera novaeangliae) adult female in foreground, with her male calf and their escort behind her. Vava'u, Tonga, South Pacific.

Solvin Zankl / After an incubation period of 45 to 55 days a first hatchling Green turtle (Chelonia mydas) emerges out of the sand, Bonaire, Leeward Antilles, Caribbean region, Netherlands Antilles

Dave Watts / Colombian spider monkey (Ateles fusciceps rufiventris) group. Captive, Critically endangered species.

Jen Guyton / Meerkat (Suricata suricatta) four siblings stand in line among grass, Kalahari Desert, South Africa

Jen Guyton / Lightning strikes during a thunderstorm over a desert endemic Welwitschia plant (Welwitschia mirabilis) near Swakopmund, Namib Desert, Namibia.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) on drifting ice, Svalbard, Norway September

Sandra Bartocha / European beechwood (Fagus sylvatica) with flowering Holewort (Corydalis cava), nature reserve Eldena, Greifswald, Germany, April.

Nayan Khanolkar / Leopard (Panthera pardus fusca) walking in alley between houses. Aarey Milk Colony in unofficial buffer zone of Sanjay Gandhi National Park, Mumbai, India. January 2016.

Rick Price / Polar bear (Ursus maritimus) on an iceberg, Baffin Bay, Canada. September.

Alex Hyde / Common European toad tadpoles (Bufo bufo), sequence showing development of limbs. Derbyshire, UK. August. Digital composite.

David Noton / Woman walking in an ice cave below the Breidamerkurjokull Glacier, eastern Iceland. February 2015. Model released.

David Noton / Hawk's Head lookout over the Murchison River gorge, Kalbarri National Park, Western Australia, December 2015.

David Noton / Conifer trees in mist at Alpe de Lerosa, Dolomite Mountains, Belluno Province, Veneto, Italy, September 2015.

Lucas Bustamante / Striped vinesnake (Philodryas argentea) Yasuni National Park, Orellana, Ecuador .

Andy Rouse / Panther Chameleon (Furcifer pardalis) male portrait, Madagascar. Controlled conditions

Lucas Bustamante / Juvenile of Amazon Tree-Boa (Corallus hortulanus) in defensive position. Yasuni National Park, Orellana, Ecuador.

Lucas Bustamante / Peruvian screech-owl (Megascops roboratus) half face close up portrait, Macara, Loja, Ecuador.

Tony Wu / Yellow pygmy goby (Lubricogobius exiguus) portrait, Kashiwajima, Japan.

Roy Mangersnes / Galapagos giant tortoise (Chelonoidis nigra) portrait, Santa Cruz Island, Galapagos.

Emanuele Biggi / Peringuey's desert adder (Bitis peringueyi) hidden in sand, Namibia.

Fiona Rogers / Zanzibar red colobus (Procolobus kirkii) baby portrait. Jozani-Chwaka Bay National Park, Zanzibar, Tanzania. May.

Claudio Contreras / Clarion Burrowing Owl (Athene cunicularia rostrata), Clarion Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), P...

Lucas Bustamante / Black and white view of Plains Zebra (Equus quagga) herd, Etosha National Park, Kunene, Namibia.