Nick Upton / Harvest mouse (Micromys minutus) cleaning its nose on Common hogweed (Heracleum sphondylium) flowerhead after release, Moulton, Northampton, UK, June.

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...

Franco Banfi / Diver exploring around an iceberg. Tasiilaq, East Greenland. April 2018.

Franco Banfi / Scuba diver exploring El Eden cenote. Quintana Roo, Yucatan Peninsula, Mexico.

Klein & Hubert / Tabby and white kitten, standing on a mossy tree trunk in a meadow in summer.

Klein & Hubert / Two months old blue tabby semi-longhaired kitten (European x Maine Coon) walking near old trunk, exploring in attic

Claudio Contreras / Caribbean Flamingo (Phoenicopterus ruber) chick age 5 days, walking around nest, breeding colony, Ria Lagartos Biosphere Reserve, Yucatan Peninsula, Mexico, June, Finalist in the Portfolio Category of...

Alex Mustard / California sea lion (Zalophus californianus) adult female swimming through sunbeams in an underwater cave. Los Isotes, La Paz, Mexico. Sea of Cortez, East Pacific Ocean.

Pete Oxford / San Lucas marsupial frog (Gastrotheca pseustes) captive, occurs in Ecuadorian Andes.

Brent Stephenson / Young Polar bear (Ursus maritimus) walking across melting sea ice, Scott Inlet, Baffin Island, Canadian Arctic, August. Vulnerable species.

Adrian Davies / Rainforest canopy walkway, Sabah, Borneo, September 2015.

Claudio Contreras / Mesoamerican slider turtle / terrapin (Trachemys scripta venusta) in sinkhole, Cenote Carwash, near Tulum, Yucatan Peninsula, Mexico, January

Klein & Hubert / Tabby and white kitten (age 5 weeks) looking at its own reflection in pond, France.

Klein & Hubert / Tabby and white kitten (age 2 and a half months) on blue fence in garden, France.

Klein & Hubert / Tabby kitten (age 7 weeks) batting paw, in garden with buttercups, France.

Klein & Hubert / Tabby kitten (age 7 weeks) walking on fence in garden with buttercups, France.

Klein & Hubert / underside view of Tabby kitten (age 2 and a half months) leaping / jumping on to hay bale, France.

Klein & Hubert / Tabby and white kitten (age two and a half months) jumping on to hay bale, France.

Juan Carlos Munoz / Tourist paddling among mangroves in canoe, Puerto Jimenez, Golfo Dulce, Osa Peninsula, Costa Rica.

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

Yukihiro Fukuda / Japanese macaque (Macaca fuscata fuscata) rare white furred baby playing with flower, Jigokudani Valley, Nagano Prefecture, Japan. June.

Juan Carlos Munoz / People exploring underground lakes via rigid inflatable boat, Cross Cave (Krizna jama) under Cross Mountain, Green Karst, Slovenia, October 2014.

Pete Oxford / Galapagos fur seal (Arctocephalus galapagoensis) near coral reef drop off, Galapagos, December.

Nick Upton / Harvest mouse (Micromys minutus) on Common hogweed (Heracleum sphondylium) flowerhead after release, Moulton, Northampton, UK, June.

Gabriel Rojo / Patagonian cavy (Dolichotis patagonum ) rear view of two, La Pampa, Argentina.

Cyril Ruoso / Bonobo (Pan paniscus) foraging in river, Lola Ya Bonobo Sanctuary, Democratic Republic of the Congo. Non-ex

Jurgen Freund / Green turtle (Chelonia mydas) hatchling swimming to the sea still in the shallows of the beach. Anano Island, Wakatobi, South Sulawesi, Indonesia

Ole Jorgen Liodden / Erect-crested penguin (Eudyptes sclateri) portrait on rocks, Antipodes Island, Sub-Antarctic New Zealand, March. Endangered species.

Kirkendall-Spring / Hiker crossing Newton Creek, Elk Meadows Trail, Mount Hood Wilderness. Oregon, USA, July 2014. Model released.

Kirkendall-Spring / Hikers on the trail to Three Fingered Jack, Mount Jefferson Wilderness, Duschutes National Forest. Oregon, USA, July 2014. Model released.

Doug Perrine / Rough-toothed dolphins (Steno bredanensis) Keauhou, Kona, Hawaii, USA, Central Pacific Ocean.

Floris van Breugel / Aurora Borealis over yellow tent lit from within and mountainous scenery, Arrigetch Peaks, Gates of the Arctic National Park, Brooks Range, Alaska, USA, August 2014.

Terry Whittaker / Pine marten (Martes martes) on branch, orange glow in sky behind from the lights of Inverness. Black Isle, Scotland, UK, October. Photographed by camera trap Highly commended in the Habitat category o...

Jordi Chias / Juvenile Green turtle (Chelonia mydas) swimming near the surface, split level view, Fakarava atoll lagoon, Tuamotu Archipelago, French Polynesia, Pacific Ocean.

Jordi Chias / Green turtle (Chelonia mydas) from underneath swimming through the surface, Mayotte Island, Comores, Indian Ocean.

David Noton / Hot air balloon over the Temples of Bagan at dawn, Myanmar, November 2012.

Olga Kamenskaya / Wide angle view of vehicle parked on ice on lake surface. Lake Baikal, Siberia, Russia, March 2007.

Neil Aldridge / Okavango robbers (Rhabdalestes maunensis) fish swimming up the temporary Selinda Spillway, northern Botswana. This shallow river cuts across the Kalahari Desert and joins the Okavango River system wit...

Jeff Vanuga / Guardian riding Camargue horse through water at sunrise, Camargue, Bouches du Rhone, France, May 2013.

Jussi Murtosaari / Speckled Wood (Pararge aegeria) male in habitat, Finland, April.

Jussi Murtosaari / Bedstraw hawk-moth (Hyles gallii) caterpillar, South Karelia, southern Finland, July.

Charlie Summers / Two juvenile Brown Bear siblings (Ursus arctos) look for food on the banks of the Anan Creek lagoon, Alaska, July.

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

Christophe Courteau / Aerial View of Spitzbergen, Svalbard, Norway, June 2012.

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

Pal Hermansen / Wood mouse (Apodemus sylvaticus) inside an old car, Bastnas, Sweden, February. Winner of the Fritz Polking Prize at the GDT competition 2013 and winner of the Portfolio category in the Melvita Nature...

Franco Banfi / Scuba diver under and between ice formations, Lake Sassolo, Sambuco valley, Ticino, Switzerland. Model released.

Franco Banfi / Diver with rebreather inside sea cage used for aquaculture with thousand of Gilt-head bream (Sparus aurata) Ponza Island, Italy, Tyrrhenian Sea, Mediterranean. Model released.