Ismaele Tortella / Black-legged kittiwake (Rissa tridactyla) nesting above a window, Lofoten, Norway, August.

Alex Mustard / Yellow tube sponge (Aplysina fistularis) on coral reef, diver exploring in background. Black Rock Drop Off, East End, Grand Cayman, Cayman Islands, British West Indies. Model released.

Shane Gross / Flying fish (Exocoetidae) in Sargasso Sea, Atlantic Ocean.

Alex Mustard / Orange painted frogfish (Antennarius pictus) fishing. Here the frogfish is illuminated by a snooted strobe and the background sand lit with a red LED torch. Bitung, North Sulawesi, Indonesia. Lembeh S...

Milan Radisics / Aerial shot of the Hafursa glacial river running over black sand, southern Iceland, August 2018.

Milan Radisics / Aerial shot of Kudafljot glacial river flowing over black volcanic soil, Iceland, August 2018.

Milan Radisics / Aerial shot of Kudafljot glacial river flowing over black volcanic soil, Iceland, August 2018.

Milan Radisics / Aerial shot of a confluence of three tributaries flowing over black sand at the mouth of the Affall River, Landeyjar area, Southern Iceland, August 2018.

Andy Rouse / Black headed bunting, (Emberiza melanocephala), catching flies on sunflower crop, Bulgaria, June.

Mary McDonald / Adult Mountain gorilla (Gorilla beringei beringei) holding baby, Hirwa group, Volcanoes National Park, Rwanda

Will Burrard-Lucas / Young male melanistic leopard (Panthera pardus), Laikipia Wilderness Camp, Kenya. Photographed with a camera trap. EDITORIAL USE ONLY. All other uses require clearance

Marie Read / Roseate spoonbill (Ajaia ajaja) adult in breeding plumage preening tail feathers, Black Point Wildlife Drive, Merritt Island National Wildlife Refuge, Florida, USA, January.

Marie Read / Arctic terns (Sterna paradisaea), two in flight over nesting colony in field of buttercups (Ranunculus sp.), Keflavik, Iceland. Digital canvas expansion.

TJ Rich / Black working cocker spaniel in bluebells, in beech woodland, Micheldever Woods, Hampshire, UK

Lorraine Bennery / Black lemur (Eulemur macaco macaco) female sitting in tree. Lokobe Reserve, Nosy Be, Madagascar.

Lorraine Bennery / Blue-eyed lemur (Eulemur flavifrons) male looking down from branch. Sahamalaza, Madagascar.

Lorraine Bennery / Blue-eyed lemur (Eulemur flavifrons) female in tree. Sahamalaza, Madagascar.

Pedro Narra / Black erget (Egretta gularis) displaying, Joao Vieira Poillo , Bijagos Archipellago. Guinea Bissau

Hermann Brehm / Blackcap (Sylviya atricapilla) male perched in blossom, Hungary, April.

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

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) herd with calf at waterhole, seen through adults legs. Tsavo Conservation Area, Kenya. Taken with a remote camera buggy / BeetleCam. Edit...

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) bulls males facing off against each other, Tsavo Conservation Area, Kenya. Editorial use only.

Will Burrard-Lucas / Black and white image of African elephant (Loxodonta africana) mud bathing, Tsavo Conservation Area, Kenya. Editorial use only.

David Fleetham / Bargibant's pygmy seahorse (Hippocampus bargibanti) wrapped around Eye fan coral (Cnidaria sp). Philippines.

Will Burrard-Lucas / Young male melanistic leopard (Panthera pardus), Laikipia Wilderness Camp, Kenya. Photographed with a camera trap. EDITORIAL USE ONLY. All other uses require clearance

Will Burrard-Lucas / Young male melanistic leopard (Panthera pardus), Laikipia Wilderness Camp, Kenya. Photographed with a camera trap. EDITORIAL USE ONLY. All other uses require clearance

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

Giri Cavale / Melanistic leopard / Black panther (Panthera pardus) Nagarahole National Park, Nilgiri Biosphere Reserve, Karnataka, India.

Giri Cavale / Melanistic leopard / Black panther (Panthera pardus) on territorial patrol on track, Nagarahole National Park, Nilgiri Biosphere Reserve, Karnataka, India.

Edwin Giesbers / Giant panda (Ailuropoda melanoleuca) in snow, captive.

Konrad Wothe / Three-striped poison frog (Ameerega trivittata) croaking, Panguana Reserve, Huanuco Region, Peru.

Tui De Roy / Great frigatebird (Fregata minor) male displaying inflated gular sac, Galapagos, Ecuador.

David Pattyn / Black necked grebe (Podiceps nigricollis) portrait of an adult bird in winter plumage. The Netherlands. April 2014

David Pattyn / Black necked grebe (Podiceps nigricollis) adult bird in breeding plumage approaching its partner in a vertical position during their courtship dance. The Netherlands.April 2014

David Pattyn / Black necked grebe (Podiceps nigricollis) adult bird spreading its wings and waiting for the submerged partner to appear in front and perform the courtship dance. This is early in the breeding season,...

Ingo Arndt / Vogelkop bowerbird (Amblyornis inornatus) decoration material (fruit and beetle elytra ) collected in order to attract females to his bower, Arfak Mountains, Irian Jaya, New Guinea, Indonesia.

Ingo Arndt / Harvest Mouse (Micromys minutus) using tail whilst climbing in reed, Germany, captive.

Ingo Arndt / Green tree ant (Oecophylla smaragdina) group on entrance from nest, built from woven leaves, Northern Territory, Kakadu National Park, Australia.

Ingo Arndt / Kingfisher (Alcedo atthis) diving into water to catch a fish, Hessen, Germany, sequence 1/9

Ingo Arndt / Kingfisher (Alcedo atthis) leaving water after successfully catching a fish, Hessen, Germany, sequence 9/9

Ingo Arndt / Kingfisher (Alcedo atthis) diving into water to catch a fish, Hessen, Germany, sequence 7/9

Ingo Arndt / Sea trout (Salmo trutta trutta) alevin just hatched with full yolk sac, Europe

Chris & Monique Fallows / Impala (Aepyceros melampus) herd at dawn, Mana Pools National Park, Zimbabwe, October.

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) alpha male 'Ferdinand' aged 20 years, females Nuru' aged 22 years and 'Nasa' aged 24 years calling. Gombe National Park, Tanzania. June 2012.

Andres M. Dominguez / Orchid (Ophrys atlantica) Sierra de Grazalema Natural Park, Benaocaz, southern Spain, May.

Wim van den Heever / Lion (Panthera leo) male with scars photographed with side-lit spot light at night. Greater Kruger National Park, South Africa, April.

Wim van den Heever / Bare-faced curassow (Crax fasciolata) portrait of female, Pantanal, Brazil.

Wim van den Heever / Black heron (Egretta ardesiaca) fishing and using wings to create an area of shade to attract fish, on the banks of the Chobe River, Botswana.

Markus Varesvuo / Female Black grouse (Tetrao / Lyrurus tetrix) perched in tree covered in snow, Inari Kiilopaa, Finland, January.

Markus Varesvuo / Male Capercaillie (Tetrao urogallus) flying, Jalasjarvi, Finland, April.

Erlend Haarberg / Mountain hare (Lepus timidus) backlit in snow, Vauldalen, Norway, May.

Franco Banfi / Green moray (Gymnothorax funebris) Santa Lucia, Camaguey, Cuba, Caribbean Sea, Atlantic Ocean

Edwin Giesbers / Western lowland gorilla (Gorilla gorilla gorilla) twin babies age 45 days resting on mother's chest, one suckling. captive, occurs in Central Africa. Critically endangered.

Edwin Giesbers / Western lowland gorilla (Gorilla gorilla gorilla) twin babies age 45 days sleeping in mother's arms, captive, occurs in Central Africa. Critically endangered.

Edwin Giesbers / Western lowland gorilla (Gorilla gorilla gorilla) twin babies age 45 days sleeping on mother's chest, captive, occurs in Central Africa. Critically endangered.

Edwin Giesbers / Western lowland gorilla (Gorilla gorilla gorilla) twin babies age 45 days resting side by side in mother's arms, captive, occurs in Central Africa. Critically endangered.

Edwin Giesbers / European bison (Bison bonasus) with town in the background, Zuid-Kennemerland National Park, the Netherlands. January. Reintroduced species.

Edwin Giesbers / Western lowland gorilla (Gorilla gorilla gorilla) twin babies age 45 days, resting on mother's chest, captive, occurs in Central Africa. Critically endangered.

Claudio Contreras / Texas indigo snake (Drymarchon melanurus erebennus) close up amongst Vervain (Glandularia sp.) flowers, Laredo Borderlands, Texas, USA. April

Wim van den Heever / Lion (Panthera leo) male in darkness, Okavango Delta, Botswana.

Wim van den Heever / Red-and-green macaw (Ara chloropterus) in flight, Pantanal, Brazil. August.

Charlie Summers / Black Jaguar (Panthera onca) kitten, captive.

Bence Mate / Leafcutter ants (Atta sp) colony harvesting a banana leaf, Costa Rica. 3rd place in the Insects and Spiders category of the Terre Sauvage Nature Images Awards competitions 2015.

Chris Mattison / Close up of succulent plant (Peperomia columella) cultivated plant form Peru. Focus-stacked image.

Alex Mustard / Nudibranch (Flabellina lineata) in aquarium, taken in the field in Gulen, Norway. North East Atlantic Ocean. Collected for scientific research.

Alex Mustard / Portrait of a Severn's pygmy seahorse (Hippocampus severnsi) at Mioskon Island, Raja Ampat, West Papua, Indonesia. Dampier Strait. Tropical West Pacific Ocean.

Alex Mustard / Black hamlet (Hypoplectrus nigricans) and Yellowbelly hamlet (Hypoplectrus aberrans) spawning at dusk. As this genus is quite recently evolved hybridization is still possible. Hamlets are one of the...

Alex Mustard / Group of predators hunting together, in an example of 'Nuclear foraging'. The Moray eel (Gymnothorax javanicus) flushes out prey, and is followed by a Napolean wrasse (Cheilinus undulatus) and a Bluef...

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant male 'Gizmo' aged 2 years lying on the forest floor. Gombe National Park, Tanzania.

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Gremlin' aged 40 years holding female baby aged 2, her granddaughter. Gombe National Park, Tanzania. Gremlin took the new born baby from he...

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Gremlin' aged 40 years calling while holding her baby granddaughter aged 2 months and her own infant son aged 2 years. Gombe National Park,...

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) infant male 'Gizmo' aged 2 years, portrait. Gombe National Park, Tanzania.

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) adult male 'Frodo' aged 35 years portrait. Gombe National Park, Tanzania.

Tony Heald / Hanuman langur (Semnopithecus entellus) eating coconut husk, Bandhavgarh National Park, India. March.

Sharon Heald / African buffalo (Syncerus caffer) low angle portrait, Chobe National Park, Botswana.

Mark Bowler / Black spider monkey (Ateles chamek) calling, captive, Peru.

Marie Read / Tufted puffin (Fratercula cirrhata), close-up portrait, St. Paul Island, Pribilofs, Alaska, USA, July.

Cyril Ruoso / Assassin bug (Reduviidae) nymph, Way Kambas National Park, Sumatra, Indonesia.

Pal Hermansen / Kittiwake (Rissa tridactyla) breeding on house wall, Norway, March.

Kristel Richard / Headshot of two rare black Kladruber stallions, harnessed for driving, at the Great Riding festival, in Slatinany national stud, Pardubice Region, Czech Republic. June 2015.

Staffan Widstrand / Wild boar (Sus scrofa) in old mixed conifer and broadleaf forest, Punia Forest Reserve, Lithuania, May.

Eric Baccega / Portrait of woman from the Mursi tribe, traditionally decorated and painted, wearing a large clay lip plate, Omo Valley, Ethiopia, March 2015.

Sven Zacek / Ravens (Corvus corax) fighting in bog during snowfall, Tartumaa, Estonia. December.

Solvin Zankl / By-the-wind sailor (Velella velella) colony. Sargasso Sea, Bermuda.

Solvin Zankl / Portuguese Man-of-War (Physalia physalis) close up of tentacles, Sargasso Sea, Bermuda

Solvin Zankl / Sargassum fish (Histrio histrio) in Broad-toothed gulfweed (Sargassum fluitans) Sargassum Community. Sargasso Sea, Bermuda

Solvin Zankl / Eel (Anguilla leptocephali) larva, Sargasso Sea, Bermuda.

Solvin Zankl / Tiny crab on Broad-toothed Gulfweed (Sargassum fluitans) Sargassum Community. Sargasso Sea, Bermuda

Solvin Zankl / Porcupinefish (Diodontidae) tiny juvenile, found in plankton community, Sargasso Sea, Bermuda.

Richard Du Toit / Black wildebeest (Connochaetus gnou) bull silhouetted at dawn, Rietvlei Nature Reserve, Gauteng Province, South Africa.

Richard Du Toit / Longtailed widowbird (Eupletes progne) male perched in flowers, Rietvlei Nature Reserve, South Africa.

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

Espen Bergersen / Kittiwakes (Rissa tridactyla) squabbling on ice. Svalbard, Norway. July

Espen Bergersen / Common raven (Corvus corax) pair in courtship display, flying upsidedown and calling, Hornoya bird cliff, Norway. March.