Alex Mustard,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...

Andy Rouse / Maasai Giraffe (Giraffa camelopardalis tippelskirchi) silhouetted by beams of light from setting sun, Maasai Mara, Kenya, Africa. Winner of the African section of the Natures Best Windland Smith Rice...

Benjamin Barthelemy,Benjamin Barthelemy / Ibex (Capra Ibex) fighting, Aiguilles Rouges National Nature Reserve, Haute-Savoie, France, June

Ingo Arndt / Compilation of various corals including many Fan corals (Gorgonacea sp) from collection at Senckenberg Museum, Frankfurt, Germany.

Ingo Arndt / Bark beetle (Scolytinae) galleries in dead spruce tree (Picea abies), Bayerischer Wald / Bavarian Forest National Park, Germany., June.

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 / Common wasp (Vespula vulgaris) detail of nest surface, Hessen, Germany, April.

Ingo Arndt / Buff tip moth (Phalera bucephala) protective web covering caterpillars and food plant, Hungary, June.

Ingo Arndt / Buff tip moth (Phalera bucephala) caterpillars feeding on leaf, Hungary, June.

Ingo Arndt / Caddisfly (Limnephilidae) case built out of sticks and bark fragments, Germany, November.

Ingo Arndt / Caddisfly (Limnephilus sp.) case built of sticks, wood fragments, seeds, snail shells and plant stems, Germany, November.

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

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

Ingo Arndt / American Crocodile (Crocodylus acutus) swimming in open ocean, Pacific Coast, Ostional, Costa Rica

Ingo Arndt / Grizzly bear (Ursus arctos horribilis) picture taken with a remote camera car, Alaska, July.

Ingo Arndt / Bower of Vogelkop Bowerbird (Amblyornis inornatus) decorated with various types of leafs, beetle wing covers, black and brown fungi, red flowers and blue berries, Arfak Mountains, West Papua, Indonesi...

Ingo Arndt / Long-jawed orb weaver spider (Tetragnatha nigrita) on web, Germany.

Ingo Arndt / Red-eyed tree frog (Agalychnis callidryas) eye closed with semi-transparent eyelid that allows it to see its surroundings even while resting, Costa Rica.

Ingo Arndt / Red-eyed Tree Frog (Agalychnis callidryas) close- up of eye half open, the golden webbed semi-transparent eyelid allows to see its surrounding even while resting, Costa Rica.

Ingo Arndt / Burned trees in front of Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011.

Ingo Arndt / Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011.

Ingo Arndt / Aerial view of Hardy Reef, Great Barrier Reef, Queensland, Australia, December 2010.

Ingo Arndt / Aerial view of Hardy Reef, Great Barrier Reef, Queensland, Australia, December 2010.

Ingo Arndt / Grizzly bear (Ursus arctos horribilis) silhouette, Lake Clark National Park, Alaska

Ingo Arndt / Grizzly bear (Ursus arctos horribilis) silhouette at sunset, Lake Clark National Park, Alaska, USA, July.

Ingo Arndt / Red wood ant (Formica rufa) carrying construction material to anthill (fir needles), Germany.

Ingo Arndt / Great Bowerbird (Chlamydera nuchalis) male at courting bower, Litchfield National Park, Australia.

Ingo Arndt / Magnetic termite (Amitermes meridionalis) aerial view of mounds in grassland, Litchfield National Park, Northern Territory, Australia.

Ingo Arndt / Reed Warbler (Acrocephalus scirpaceus) nest in Senckenberg Natural Hystory Collection Dresden, Germany.

Ingo Arndt / Garden Spider (Araneus diadematus) web with dew drops, at sunrise, Germany, August.

Ingo Arndt / Magnetic termite (Amitermes meridionalis) aerial view of mounds in grassland, Litchfield National Park, Northern Territory, Australia.

Ingo Arndt / Magnetic Termite (Amitermes meridionalis) mounds in grassland, Litchfield National Park, Northern Territory, Australia.

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

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

Ingo Arndt / Weaver bird nest (Ploceus sp.) detail from Africa in collection at Uebersee-Museum, Bremen, Germany.

Ingo Arndt / Fan Coral (Echinogorgia sp) from Indo-Pacific, in collection at Senckenberg Museum, Frankfurt, Germany.

Ingo Arndt / Common Moorhen (Gallinula chloropus) nest from Germany in collection at Uebersee-Museum, Bremen, Germany.

Ingo Arndt / Common Moorhen (Gallinula chloropus) nest from Germany in collection at Uebersee-Museum, Bremen, Germany.

Ingo Arndt / Harvest Mouse (Micromys minutus) nest, Germany.

Ingo Arndt / Bower of Vogelkop bowerbird (Amblyornis inornatus) front entrance of bower decorated with red fruit and acorns, Arfak Mountains, West Papua, Indonesia.

Ingo Arndt / Baya weaver (Ploceus philippinus) subadult birds practising building 'play nest', Singapore.

Ingo Arndt / Baya weaver (Ploceus philippinus) male flying to nest entrance, Singapore

Ingo Arndt / Male Vogelkop Bowerbird (Amblyornis inornatus) constructing bower roof. Arfak Mountains, West Papua, Indonesia.

Ingo Arndt / European Red Wood Ant (Formica polyctena) nests in pine forest, Hessen, Germany, July.

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

Ingo Arndt / Grizzly bear (Ursus arctos horribilis) portrait, Lake Clark National Park, Alaska, USA, September.

Ingo Arndt / Villagers collecting eggs from Olive ridley sea turtles (Lepidochelys olivacea) during the first two days of the arribada (mass nesting event). This is the only place in the world where it is legal to...

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) digging their nests by night with stars during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) females coming ashore at twilight during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) females coming ashore during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Robert Thompson / River Gave de Gavarnie with Cirque du Gavarnie in the distance, Pyrenees National Park, France, June 2013.

Robert Thompson / Owlfly sulphur (Libelloides coccajus) on flower, near Gavarnie, Pyrenees National Park, France, June.

Robert Thompson / River flowing from Lac de Gaube, Pyrenees National Park, Hautes Pyrenees, France, July 2013.

Robert Thompson / European common frog (Rana temporaria) on rock by waterfall, near Lac des Gloriettes dam, Pyrenees National Park, France, June.

Robert Thompson / Black veined white butterfly (Aporia crataegi) on grass, Gavarnie-Gedre, Pyrenees National Park, France, June.

Eric Baccega / Black flat-coated retriever dog splashing in water and retrieving stick (Canis familiaris)

Eric Baccega / Polar bear cub 3 months (Ursus maritimus) playing in the front of the day den in march. Wapusk National Park. Churchill, Manitoba, Canada

Eric Baccega / Polar bear (Ursus maritimus) female coming out the den with one three month cub. Wapusk National Park, Churchill, Manitoba, Canada, March.

Eric Baccega / Polar bear (Ursus maritimus) female coming out the den and shaking off snow. Wapusk National Park, Churchill, Manitoba, Canada, March.

Olga Kamenskaya / Ice stalagmites / ice spikes formation, Lake Baikal, Siberia, Russia, March.

Olga Kamenskaya / Ice splash out formation with icicles, Lake Baikal, Siberia, Russia, March

Olga Kamenskaya / View of people standing on ice from underneath car, on the ice of Lake Baikal, Siberia, Russia, March. Property released and Model released.

Olga Kamenskaya / Mini van crossing over pile of ice on Lake Baikal, Siberia, Russia, March.

Olga Kamenskaya / Mini van crossing Lake Baikal ice, Siberia, Russia, March.

Olga Kamenskaya / Car on thick Lake Baikal ice, Lake Baikal, Siberia, Russia, March. Property released.

Olga Kamenskaya / Ice pile of broken shelf ice, near the shore of Lake Baikal, Siberia, Russia, March.

Olga Kamenskaya / Pyramidal ice fragment reflected on the surface of Lake Baikal. Ice fragment acting as a prism refracting light into rainbow. Siberia, Russia, March.

Olga Kamenskaya / Ice fragment reflected in the ice of Lake Baikal, Siberia, Russia, March.

Olga Kamenskaya / Ice fragment reflected in the ice of Lake Baikal, Siberia, Russia, March.

Olga Kamenskaya / Ice fragment on crack in Lake Baikal ice, Siberia, Russia, March.

Olga Kamenskaya / Man looking into ice hole dug for ice diving, Lake Baikal, Siberia, Russia, March. Model released.

Olga Kamenskaya / Clear panes of ice on Lake Baikal, Siberia, Russia, March.

Olga Kamenskaya / Clear pane of ice, Lake Baikal, Siberia, Russia, March.

Dong Lei / Blood pheasants (Ithaginis cruentus) foraging in habitat, one looking at the camera, Meli Snow Mountain National Park, Yunnan Province, China, January. Endemic. Taken with remote camera.

Dong Lei / Jungle Crow (Corvus macrorhynchos) perched on tree branch with rainbow, Shejila mountain, Qinghai-Tibetan Plateau, Tibet, China. July.

Dong Lei / Tibetan snowfinch (Montifringilla adamsi) with prey, perched on Mani stone- a stone with mantra or prayer to Avalokiteshvara, near to Namtso lake, Nyaingqentanglha Mountains, Qinghai-Tibetan Plateau,...

Dong Lei / White-browed Rosefinch (Carpodacus thura) with Tibetan prayer flags featuring the 'wind horse'. Pamuling mountain, Qinghai-Tibetan Plateau, China,

Dong Lei / Fish eye view of people collecting firewood, Daocheng City, Sichuan Province, China, July 2010.

Dong Lei / Mountains in Yarlung Zangbo Grand Canyon National Park, Nyingchi Prefecture, Qinghai Tibetan Plateau, Tibet, China, October 2010.

Dong Lei / Landscape with buddhist shrine, Tibet, Qinghai-Tibetan Plateau, China, August 2006.

Dong Lei / Himalayan goral (Naemorhedus goral) in forest, Tangjianhe National Nature Reserve, Sichuan Province, China. April.

Dong Lei / Yellow poppywort (Meconopsis integrifolia) flowering, Qinghai-Tibet Plateau, Shiqu County, Sichuan Province, China, August.

Alan Williams / Domestic pigeons (Columba livia) flock in flight over houses, Cheshire, UK, June.

Michael Pitts / British Admiralty anchor - mid 1750's - possibly from the wreck of HMS Colossus - wrecked 1798. St Mary's Roads. Isles of Scilly. England, UK, August 2013.

Michael Pitts / Diver Ron Howse ascending the shot line in Lyme Bay, off Portland Bill, Dorset, England, UK, September 2010. Model released.

Michael Pitts / Gentoo penguins (Pygoscelis papua) calling and defending their eggs from Southern Skua (Stercorarius antarcticus) hunting for unattended eggs or chicks, Sea Lion island, The Falklands, South Atlantic.

Michael Pitts / Green Turtle (Chelonia mydas) hatchling swimming out to deep water from Karan Island, Saudi Arabia, Arabian Gulf.

Michael Pitts / Green Turtle (Chelonia mydas) Hatchling swimming out to deep water from Karan Island after being released from boat. Saudi Arabia. Arabian Gulf.

Andy Trowbridge / Female goshawk (Accipiter gentilis) hiding Wood pigeon (Columba palumbus) prey from passing crows. Southern Norway, February.

Andy Trowbridge / Arctic Fox (Alopex / Vulpes lagopus) yawning, during moult from grey summer fur to winter white. Dovrefjell National Park, Norway, September.

Andy Trowbridge / Arctic Fox cub (Alopex / Vulpes lagopus) standing in fresh snow, blue morph. Dovrefjell National Park, Norway, September.

Andy Trowbridge / Pine marten (Martes martes) juvenile male looking around pine tree. Molde, Central Norway, September.

Andy Trowbridge / Arctic Fox (Alopex / Vulpes lagopus) standing on ridge, during moult from grey summer fur to winter white. Dovrefjell National Park, Norway, September.

Andy Trowbridge / Arctic Fox (Alopex / Vulpes lagopus) hunting in fresh snow, during moult from grey summer fur to winter white. Dovrefjell National Park, Norway, September.

Andy Trowbridge / Arctic Fox (Alopex / Vulpes lagopus) portrait in early morning light, during moult from grey summer fur to winter white. Dovrefjell National Park, Norway, September.

Andy Trowbridge / Arctic Fox (Alopex / Vulpes lagopus) standing on ridge, mist/fog in the background. Dovrefjell National Park, Norway, September.