Alex Mustard / Grooved brain coral (Diploria labyrinthiformis) at night with polyps extended to feed, Grand Cayman, Cayman Islands, British West Indies. Caribbean Sea.

Doug Perrine / Bioluminescence from glowing plankton in sea tide line on beach, with stars above and ship lights on horizon, Vaadhoo Island, Raa Atoll, Maldives, Indian Ocean, October 2010

Martin Dohrn / Herd of giraffes (Giraffa camelopardalis) resting at night, Masai Mara, Kenya. Image taken at night using thermal camera technology, with no artificial light.

Martin Dohrn / Group of lions (Panthera leo) at night, Masai Mara, Kenya. Photographed using 'Starlight Camera' technology without artificial lighting.

Uri Golman / Volcanic eruption near Eyjafjallajoekull glacier, Iceland, 24/03/2010. Volcano dormant since 1821.

Alex Mustard / Synchronous spawning of a mountainous star coral (Montastraea faveolata) at night. East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Gavin Hellier / Apartment buildings at dusk in Central Shanghai, Shanghai, China, 2010. No release available.

Gavin Hellier / New Pudong skyline, looking across the Huangpu River from the Bund, Shanghai, China 2010. No release available.

Gavin Hellier / Shanghai night skyline, the view along Huangpu River and the Bund, Shanghai, China 2010. No release available.

Gavin Hellier / Looking down on St. Vitus Cathedral, Charles Bridge, UNESCO World Heritage Site, and the Castle District illuminated at night, Prague, Czech Republic 2011. No release available.

Gavin Hellier / Typical yellow taxis below skyscrapers along Sixth Avenue, Manhattan, New York City, USA, 2009. No release available.

Gavin Hellier / Looking up at the Empire State Building on a rainy evening, Manhattan, New York City, USA 2009. No release available.

Gavin Hellier / Elevated view over the Djemaa el-Fna at sunset, Marrakech, Morocco, 2011. No release available.

Gavin Hellier / Elevated night view of the Petronas Twin Towers, illuminated at night, Kuala Lumpur, Malaysia, 2012. No release available.

Gavin Hellier / The restored Souq Waqif with mud rendered shops and exposed timber beams at night, Doha, Qatar, Arabian Peninsula, 2011. No release available.

Gavin Hellier / Khao San Road at dusk, Banglamphu, Bangkok, Thailand, 2010. No release available.

Gavin Hellier / Tuk Tuk or auto rickshaw in motion at night, Bangkok, Thailand, 2010. Model released.

Gavin Hellier / Street scene above mini bus station and Neon lights of Mong Kok, Kowloon, Hong Kong, China, July 2011. No release available.

Richard Steel / 2020VISION / Badger (Meles meles) at night, Oxfordshire, England, UK, October.

Neil Aldridge / Meerkat (Suricata suricatta) standing and keeping watch while another excavates a burrow in soft sand before disappearing underground for the night. Makgadikgadi Pans, Botswana, April.

Kevin Schafer / Giant Armadillo (Priodontes maximus), adult female standing and sniffing air. Pantanal, Brazil, October.

Alex Mustard / Boulder star coral (Montastraea annularis) spawning at night with released bundles of eggs and sperm floating away in the water column, East End, Grand Cayman, Cayman Islands, British West Indies, Car...

Alex Mustard / A large colony of Mountainous star coral (Montastraea faveolata) spawning at night on a coral reef, showing the synchronous release of bundles of eggs and sperm, East End, Grand Cayman, Cayman Islands...

Markus Varesvuo / Arctic Tern (Sterna paradisaea) in flight, silhouetted against the moon at dusk, Uto Finland July

Mark MacEwen / Male Marsh pride lion (Panthera leo) on a moonless night, Masai Mara, Kenya. Taken with infra red camera, September

Mark Carwardine / Kakapo (Strigops habroptila) wild male known as Sirocco walking along the ground, night parrot, Codfish Island, off Stewart Island, southern New Zealand, Critically endangered species

Mark Carwardine / Kakapo (Strigops habroptila) wild male known as Sirocco, night parrot, Codfish Island, off Stewart Island, southern New Zealand, Critically endangered species

Mark Carwardine / Kakapo (Strigops habroptila) wild male known as Sirocco perched in tree, night parrot, Codfish Island, off Stewart Island, southern New Zealand, Critically endangered species

Mark Carwardine / Kakapo (Strigops habroptila) wild male known as Sirocco, night parrot, Codfish Island, off Stewart Island, southern New Zealand, Critically endangered species

Mark Carwardine / Mass of insects swarming around light, Tefe, Amazonia, Brazil

Mark Carwardine / Kakapo / Sirocco / Night parrot (Strigops habroptila) wild male. Codfish Island, southern New Zealand, January 2009.

Mark Carwardine / Aye-aye {Daubentonia madagascariensis} feeding in palm tree at night, Aye-aye Island, NE Madagascar

Mark Carwardine / Straw-coloured fruit bat (Eidolon helvum) flying at night, Kasanka National Park, Zambia, Africa

Sergey Gorshkov / Ash and lava erupting from Plosky Tolbachik Volcano, Kamchatka Peninsula, Russia, 15 December 2012

Sergey Gorshkov / Ash plume and lava erupting from Plosky Tolbachik Volcano, Kamchatka Peninsula, Russia, 5 December 2012

Christophe Courteau / Small Spotted Genet (Genetta genetta) poking head out of a tree at night, Botswana

Christophe Courteau / Spotted Hyaena (Crocuta crocuta) at night, South Africa

Christophe Courteau / Female Leopard (Panthera pardus) at night, Botswana

Christophe Courteau / The Lighthouse La Vieille at night in front of the Pointe du Raz, Brittany, France.

Christophe Courteau / African Genet at night in Mopane Tree (Genetta genetta africana) Okavango Delta. Botswana

Christophe Courteau / Four lighthouse at night in stormy weather, Brittany, France

Christophe Courteau / Night waterlily {Nymphaea lotus}. Moremi GR, Okavango delta, Botswana.

Steven Kazlowski / Dall sheep (Ovis dalli) solitary animal at sunset with a storm moving across the sky, Denali National Park, interior Alaska, USA

Oriol Alamany / View of the night sky looking up through trees, with stars and the Milky Way, Mopani, Kruger National Park, Transvaal, South Africa, September.

Oriol Alamany / African Elephant (Loxodonta africana) browsing, Kruger National Park, Transvaal, South Africa, September.

Jack Dykinga / Star trails in sky over Alabama Hills, BLM eroded granite formation know as Mobius Arch. Eastern Sierra, California. May 2012.

Mark Taylor / Forest fire at night with silhouetted trees, Yellowstone National Park, Wyoming, USA

Jeff Rotman / Common thresher shark (Alopias vulpinus) caught in gill net, observed by diver at night, Huatampo, Mexico, Gulf of California, Pacific Ocean. Model released. May 2008.

Erlend Haarberg / Fumaroles at Hverir at night with northern lights in sky above, Namafjall, Iceland, February 2011

Erlend Haarberg / Volcanic eruption at Eyjafjallajokull with ash and lava exploding into the air at night, Iceland, May 2010

Sandra Bartocha / Scots Pine trees (Pinus sylvestris) in evening sunlight. January. Specially commended, Creative Visions category, Wildlife Photographer of the Year WPY 2012 competition.

Vladimir Medvedev / Amur Leopard (Panthera pardus orientalis) on rocky slope at night, Kedrovaya Pad reserve, Primorskiy krai, Far East Russia, December, Critically endangered species.

David Pattyn / Spectacled caiman (Caiman yacare) walking on a sandy shore at the edge of a river at night, Pantanal, Brazil

Juan Carlos Munoz / Black-crowned Night Heron (Nycticorax nycticorax) portrait. Everglades National Park, Florida, USA, February.

Vladimir Medvedev / Camera trap image of wild Siberian tiger (Panthera tigris altaica) walking through woodland, Lazovsky Zapovednik Nature Reserve, Primorsky Krai, Far East Russia, November 1994

Vladimir Medvedev / Camera trap image of wild female Siberian tiger (Panthera tigris altaica) scent marking the trunk of a Cedar (Cedrus) tree, Lazovsky Zapovednik Nature Reserve, Primorsky Krai, Far East Russia, April...

Yukihiro Fukuda / Japanese giant salamander hunting at night in a river, Japan, May

Tui De Roy / Yellow-crowned night heron (Nyctanassa / Nyctanassa violacea) portrait. Galapagos Islands, Ecuador, June.

Tui De Roy / Great frigatebird (Fregata minor) male taking flight at dusk. Espanola Island, Galapagos, Ecuador, May.

Philippe Clement / Common tree frog (Hyla arborea) sitting on branch covered in lichen at night with full moon, La Brenne, France, May. Digital composite

Kerstin Hinze / Bush fire at night near Mooi River, KwaZulu-Natal, South Africa, October 2006

Charlie Summers / Stars draw traces above Naabi Hill acacia trees, Serengeti National Park, Tanzania

Sandra Bartocha / Ghost wood - European Beech (Fagus sylvatica), woodland Nienhagen, Germany, April

Sandra Bartocha / Common Snowdrop (Galanthus nivalis) in Mecklenburg-Strelitz, Mecklenburg-Vorpommern, Germany, March

Sandra Bartocha / Cowslip (Primula veris) and Cuckoo Flower (Cardamine pratensis) in flower with light effects, Brandenburger Vorstadt, Potsdam, Germany, April

Terry Whittaker / 2020VISION / European Badger (Meles meles) on the North Downs above Folkestone, Kent, UK, June. Camera trap photo.

Terry Whittaker / 2020VISION / European Badgers (Meles meles) adult and juvenile on the North Downs above Folkestone, Kent, UK. Camera trap photo.

Eric Medard / Lesser Mouse Eared Bat (Myotis blythii) in flight in cave. France, Europe, August.

Eric Medard / Mediterranean Horseshoe Bat (Rhinolophus euryale) in flight in cave. France, Europe, August.

Eric Medard / Whiskered Bat (Myotis mystacinus) in flight low over water, drinking in flight. France, Europe, July.

Eric Medard / Natterer's Bat (Myotis nattereri) flying low over water to drink, with long-exposure star-trails. France, Europe, July.

Eric Medard / Bechstein's Bat (Myotis bechsteinii) in flight in cave. France, Europe, August.

Eric Medard / Bechstein's Bat (Myotis bechsteinii) in flight at night, mouth open to emit echolocating calls. France, Europe, September.

Eric Medard / Kuhl's Pipistrelle Bat (Pipistrelle kuhlii) in flight low over water, with splash from drinking in flight. France, Europe, May.

Eric Medard / Western Barbastelle Bat (Barbastella barbastella) in flight low over water, mouth open to emit echolocating calls. France, Europe, July.

Michael D. Kern / Mossy leaf-tailed gecko, (Uroplatus sikorae) captive from Madgascar

Alex Mustard / Big fin reef squid (Sepioteuthis lessoniana) descends from open water to the reef at night. Arafur Sea, Triton Bay, West Papua, Indonesia.

David Noton / Moon over Cathedral Cove at dawn, near Hahei, Coromandel Peninsula, North Island, New Zealand. December 2006.

Steven Kazlowski / Green Aurora borealis over the Beaufort Sea, seen from the 1002 area of the Arctic National Wildlife Refuge, North Slope of the Brooks Range, Alaska, October 2011

Enrique Lopez-Tapia / The last light of day illuminating the summit of Mount Everest, Sagarmatha National Park, Khumbu, Himalayas, Nepal, October 2011.

Enrique Lopez-Tapia / ENCE Company Paper mill at night, Navia, Asturias Spain, April 2006 No release available.

Paul Harris / 2020VISION / Man and child looking at Barn Owl at the Black Country Living Wildlife Roadshow, Sandwell Park Farm, West Bromwich, West Midlands, August 2011. Did you know? Although owls have excellent night vision...

Martin Dohrn / John Ruthven swimming in the Bioluminescence Bay in Vieques, Puerto Rico. Dinoflagellates create the bioluminescense when disturbed. Model released.

Martin Dohrn / Cardinal fish (Apogon sp) moments after it has mistakenly tried to eat an ostracod. The ostracod then releases glowing mucus that is so bright that it can be seen through the body of the fish. This gi...

Shibai Xiao / Spotted linsang (Prionodon pardicolor) sitting in tree, Hainan Province, China.

Shibai Xiao / Scientist using white sheet and light trap to capture bugs and moth species for research, Guangxi Province, China, November 2008. No release available.

Shibai Xiao / Chinese ferret badger (Melogale moschata) two captured by camera trap at night, Guangxi Province, China.

Shibai Xiao / Northern treeshrew (Tupaia belangeri) captured with camera trap at night, Bawangling National Nature Reserve, Hainan Island, China.

Alex Mustard / 2020VISION / Devonshire cup coral (Caryophyllia smithii) photographed under deep blue light to reveal its fluorescent pigments, showing up as green in this photo. Plymouth Sound, Devon, UK, English Channel, July

Juan Carlos Munoz / Northern lights / Aurora borealis over snowy landscape, Iceland, Europe, March 2012

Juan Carlos Munoz / Northern lights / Aurora borealis, Iceland, Europe, March 2012

Daniel Heuclin / Antsingy leaf chameleon (Brookesia perarmata) Tsingy de Bemahara, Madagascar. Endangered species.

Dale Sutton / 2020VISION / Tawny owl (Strix aluco) flying with Dormouse prey (Muscardinus avellanairus) to nest, Sussex, UK, April

Erlend Haarberg / Steam vents at night with northern lights, Hverir, Namafjall, Iceland, February 2011

Erlend Haarberg / Steam vents at night, Hverirt, Namafjall, Iceland, February 2011

Erlend Haarberg / Hverfjall crater at night, Myvatn, Iceland, March 2011