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Neotropical river otter (Lontra longicaudis) in water, Nicoya Peninsula, Costa Rica, March 2015.
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Nick Hawkins / Neotropical river otter (Lontra longicaudis) in water, Nicoya Peninsula, Costa Rica, March 2015.
African fish eagle (Haliaeetus vocifer) standing on the banks of the Chobe River, Chobe National Park, Botswana.
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Neil Aldridge / African fish eagle (Haliaeetus vocifer) standing on the banks of the Chobe River, Chobe National Park, Botswana.
Yellow-billed stork (Mycteria ibis) catching a young barbel or catfish in the shallows of the Chobe River, Chobe National Park, Botswana.
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Neil Aldridge / Yellow-billed stork (Mycteria ibis) catching a young barbel or catfish in the shallows of the Chobe River, Chobe National Park, Botswana.
African elephant (Loxodonta africana) crosses the Selinda Spillway, northern Botswana. Vulnerable.
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Neil Aldridge / African elephant (Loxodonta africana) crosses the Selinda Spillway, northern Botswana. Vulnerable.
Kaieteur Falls is the world's widest single drop waterfall, located on the Potaro river in the Kaieteur National Park, in Essequibo, Guyana, South America
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Pete Oxford / Kaieteur Falls is the world's widest single drop waterfall, located on the Potaro river in the Kaieteur National Park, in Essequibo, Guyana, South America
Fishing spider (Trechalea) waiting to catch a Killifish (Cyprinodontiformes) in a rainforest stream at night, Central Caribbean foothills, Costa Rica.
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Alex Hyde / Fishing spider (Trechalea) waiting to catch a Killifish (Cyprinodontiformes) in a rainforest stream at night, Central Caribbean foothills, Costa Rica.
Asiatic elephant (Elephas maximus), herd drinking water and crossing Mountain River at dawn, Jim Corbett National Park, India.
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Yashpal Rathore / Asiatic elephant (Elephas maximus), herd drinking water and crossing Mountain River at dawn, Jim Corbett National Park, India.
Maldive anemonefish (Amphiprion nigripes) shoal swimming in the current flowing over a Magnificent sea anemone (Heteractis magnifica). Baa Atoll, Maldives. Indian Ocean.
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Alex Mustard / Maldive anemonefish (Amphiprion nigripes) shoal swimming in the current flowing over a Magnificent sea anemone (Heteractis magnifica). Baa Atoll, Maldives. Indian Ocean.
African Leopard (Panthera pardus) jumping across river Maasai Mara, Kenya, Africa. August.
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Andy Rouse / African Leopard (Panthera pardus) jumping across river Maasai Mara, Kenya, Africa. August.
Atlantic salmon (Salmo salar) leaping on upstream migration, River Tyne, Hexham, Northumberland, UK, November
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Ann & Steve Toon / Atlantic salmon (Salmo salar) leaping on upstream migration, River Tyne, Hexham, Northumberland, UK, November
Giant Otter (Pteronura brasiliensis) adult with young in water, Pantanal, Brazil
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Tony Heald / Giant Otter (Pteronura brasiliensis) adult with young in water, Pantanal, Brazil
Grass snake (Natrix natrix) swimming in river, Olo, Alvao, Portugal, June.
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Luis Quinta / Grass snake (Natrix natrix) swimming in river, Olo, Alvao, Portugal, June.
Bealach na Ba Pass, Wester Ross, Scotland, UK, November 2015.
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Niall Benvie / Bealach na Ba Pass, Wester Ross, Scotland, UK, November 2015.
Water cascading over naturally formed tufa dam. Tufa is a kind of limestone, formed from the precipitation of carbonate minerals which builds up around mosses and water plants to form a solid limeston...
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Alex Hyde / Water cascading over naturally formed tufa dam. Tufa is a kind of limestone, formed from the precipitation of carbonate minerals which builds up around mosses and water plants to form a solid limeston...
Grizzly bear (Ursus arctos horribilis) cub playing with mother, Katmai National Park, Alaska, USA, August
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Loic Poidevin / Grizzly bear (Ursus arctos horribilis) cub playing with mother, Katmai National Park, Alaska, USA, August
Grizzly bear (Ursus arctos horribilis) mother watching cub catching salmon, Katmai National Park, Alaska, USA, August
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Loic Poidevin / Grizzly bear (Ursus arctos horribilis) mother watching cub catching salmon, Katmai National Park, Alaska, USA, August
Grizzly bear (Ursus arctos horribilis) mother and cub in river, Katmai National Park, Alaska, USA, August
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Loic Poidevin / Grizzly bear (Ursus arctos horribilis) mother and cub in river, Katmai National Park, Alaska, USA, August
Grizzly bear (Ursus arctos horribilis) cubs with salmon,   Katmai National Park, Alaska, August. Small reproduction only.
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Loic Poidevin / Grizzly bear (Ursus arctos horribilis) cubs with salmon, Katmai National Park, Alaska, August. Small reproduction only.
Grizzly bear (Ursus arctos horribilis) cubs with salmon,   Katmai National Park, Alaska, August. Small reproduction only.
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Loic Poidevin / Grizzly bear (Ursus arctos horribilis) cubs with salmon, Katmai National Park, Alaska, August. Small reproduction only.
European stonechat (Saxicola rubicola) male perched with mountainous habitat behind, Sierra de Grazalema Natural Park, southern Spain, February.
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Andres M. Dominguez / European stonechat (Saxicola rubicola) male perched with mountainous habitat behind, Sierra de Grazalema Natural Park, southern Spain, February.
Bacteria (Lepthotryx discophora) causing iridescent patterns and White willow tree leaf (Salix alba) in river, Sierra de Grazalema Natural Park, southern Spain, November.
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Andres M. Dominguez / Bacteria (Lepthotryx discophora) causing iridescent patterns and White willow tree leaf (Salix alba) in river, Sierra de Grazalema Natural Park, southern Spain, November.
Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River. Masai Mara National Reserve, Kenya.
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Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River. Masai Mara National Reserve, Kenya.
Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River. Masai Mara National Reserve, Kenya.
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Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River. Masai Mara National Reserve, Kenya.
Pebbles reflected in the water surface at mouth of Sheryldy river, Lake Baikal, Siberia, Russia.  September
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Olga Kamenskaya / Pebbles reflected in the water surface at mouth of Sheryldy river, Lake Baikal, Siberia, Russia. September
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.
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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.
View of a rainbow in the spray of Bjornefossen Waterfall, Saltfjellet-Svartisen National Park, Norway, August 2015.
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Orsolya Haarberg / View of a rainbow in the spray of Bjornefossen Waterfall, Saltfjellet-Svartisen National Park, Norway, August 2015.
View of the Laitaure delta and Rapa River, Sarek National Park, Laponia World Heritage Site,  Sweden, September 2013.
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Orsolya Haarberg / View of the Laitaure delta and Rapa River, Sarek National Park, Laponia World Heritage Site, Sweden, September 2013.
Long exposure of tidal water flowing off rocks, with the Okshornan Mountains in the background, Isle of Senja, Troms, Norway, February 2015.
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Benjamin Barthelemy / Long exposure of tidal water flowing off rocks, with the Okshornan Mountains in the background, Isle of Senja, Troms, Norway, February 2015.
Atlantic salmon (Salmo salar) leaping a weir, Shrewsbury, River Severn, Shropshire, England, UK. November.
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Will Watson / Atlantic salmon (Salmo salar) leaping a weir, Shrewsbury, River Severn, Shropshire, England, UK. November.
Horseshoe Bend in the Colorado river, near Page, Arizona, USA, February 2015.
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Juan Carlos Munoz / Horseshoe Bend in the Colorado river, near Page, Arizona, USA, February 2015.
Water cascading down Toberia falls, Andoin, Sierra Entzia Natural Park, Alava, Basque Country, Spain, April.
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Juan Carlos Munoz / Water cascading down Toberia falls, Andoin, Sierra Entzia Natural Park, Alava, Basque Country, Spain, April.
Night stars over Yosemite Falls, Yosemite National Park, California, USA, May 2014.
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Jeff Vanuga / Night stars over Yosemite Falls, Yosemite National Park, California, USA, May 2014.
Sea lavender (Limonium vulgare) growing in saltmarsh, with Blakeney Village in the background, Norfolk, England, UK, July.
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Ernie Janes / Sea lavender (Limonium vulgare) growing in saltmarsh, with Blakeney Village in the background, Norfolk, England, UK, July.
Meltwater from Engenbreen glacier, Meloy, Nordland, Norway, August.
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Erlend Haarberg / Meltwater from Engenbreen glacier, Meloy, Nordland, Norway, August.
Bottlenosed dolphin (Tursiops truncatus)  porpoising during annual sardine run, Port St Johns, South Africa. June.
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Wim van den Heever / Bottlenosed dolphin (Tursiops truncatus) porpoising during annual sardine run, Port St Johns, South Africa. June.
Nile crocodile (Crocodylus niloticus) still in the fast flowing water of the Mara River, taken with slow shutter speed. Masai Mara, Kenya.
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Wim van den Heever / Nile crocodile (Crocodylus niloticus) still in the fast flowing water of the Mara River, taken with slow shutter speed. Masai Mara, Kenya.
Blue wildebeest (Connochaetes taurinus) leaping into Mara River, Masai Mara, Kenya.
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Wim van den Heever / Blue wildebeest (Connochaetes taurinus) leaping into Mara River, Masai Mara, Kenya.
Black rhinoceroses (Diceros bicornis) swimming acorss river, Zimbabwe.
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Roland Seitre / Black rhinoceroses (Diceros bicornis) swimming acorss river, Zimbabwe.
Blue poppy (Meconopsis betonicifolia),  Mount Namjagbarwa, Yarlung Zangbo Grand Canyon National Park, Tibet, China.
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Dong Lei / Blue poppy (Meconopsis betonicifolia), Mount Namjagbarwa, Yarlung Zangbo Grand Canyon National Park, Tibet, China.
Wide angle view of Otter (Lutra lutra) walking on the ice  of a river, Southern Estonia, January.
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Sven Zacek / Wide angle view of Otter (Lutra lutra) walking on the ice of a river, Southern Estonia, January.
Aerial view of Rver Koiva, and the border between Estonia and Latvia in Southern Estonia, Valgamaa, Estonia. August 2014. Estonia is on the left side of the river and Latvia on the right bank.
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Sven Zacek / Aerial view of Rver Koiva, and the border between Estonia and Latvia in Southern Estonia, Valgamaa, Estonia. August 2014. Estonia is on the left side of the river and Latvia on the right bank.
Tisisat Falls / Blue Nile Falls along the Blue Nile, south of Bahir Dar, Lake Tana Biosphere Reserve, Ethiopia. December 2013.
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Bruno D'Amicis / Tisisat Falls / Blue Nile Falls along the Blue Nile, south of Bahir Dar, Lake Tana Biosphere Reserve, Ethiopia. December 2013.
Tisisat Falls / Blue Nile Falls along the Blue Nile, south of Bahir Dar, Lake Tana Biosphere Reserve, Ethiopia. December 2013.
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Bruno D'Amicis / Tisisat Falls / Blue Nile Falls along the Blue Nile, south of Bahir Dar, Lake Tana Biosphere Reserve, Ethiopia. December 2013.
Japanese firefly (Luciola cruciata) light trails at night above stream in rural Japan. June.
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Mark MacEwen / Japanese firefly (Luciola cruciata) light trails at night above stream in rural Japan. June.
Aerial view of Amazon River, with settlements and secondary rainforest, near Iquitos, Peru. July 2015.
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Mark Bowler / Aerial view of Amazon River, with settlements and secondary rainforest, near Iquitos, Peru. July 2015.
Aerial view of  Yavari-Mirin River and oxbow lake and Amazon Rainforest, Peru, July.
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Mark Bowler / Aerial view of Yavari-Mirin River and oxbow lake and Amazon Rainforest, Peru, July.
Aerial view of Delta Sierpe River Terraba, Corcovado National Park, Osa Peninsula, Puntarenas Province, Costa Rica. December 2014.
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Juan Carlos Munoz / Aerial view of Delta Sierpe River Terraba, Corcovado National Park, Osa Peninsula, Puntarenas Province, Costa Rica. December 2014.
Aerial view of waterfall on the coastline of Corcovado National Park, Osa Peninsula, Puntarenas Province, Costa Rica. December 2014.
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Juan Carlos Munoz / Aerial view of waterfall on the coastline of Corcovado National Park, Osa Peninsula, Puntarenas Province, Costa Rica. December 2014.
Aerial view of Delta Sierpe River Terraba, Corcovado National Park, Osa Peninsula, Puntarenas Province, Costa Rica. December 2014.
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Juan Carlos Munoz / Aerial view of Delta Sierpe River Terraba, Corcovado National Park, Osa Peninsula, Puntarenas Province, Costa Rica. December 2014.
Gayal / Mithun (Bos frontalis) on river bank. Arunachal Pradesh, North East India. November 2014.
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Pete Oxford / Gayal / Mithun (Bos frontalis) on river bank. Arunachal Pradesh, North East India. November 2014.
Autumn trees on the Rapa River Delta, aerial view, Rapadalen Sarek National Park, Sweden, September 2009.
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Sven Zacek / Autumn trees on the Rapa River Delta, aerial view, Rapadalen Sarek National Park, Sweden, September 2009.
Great egret (Ardea alba) taking off with fish prey in mouth, Myakka River State Park, Florida, USA, March.
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George Sanker / Great egret (Ardea alba) taking off with fish prey in mouth, Myakka River State Park, Florida, USA, March.
North American river otter (Lontra canadensis) two in water with autumnal trees reflected in the water, Acadia National Park, Maine, USA, October.
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George Sanker / North American river otter (Lontra canadensis) two in water with autumnal trees reflected in the water, Acadia National Park, Maine, USA, October.
Tourists looking down onto underground stream, from illuminated pathway, Skocjan Caves, Green Karst, Slovenia, October 2014.
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Juan Carlos Munoz / Tourists looking down onto underground stream, from illuminated pathway, Skocjan Caves, Green Karst, Slovenia, October 2014.
Marabou storks (Leptoptilos crumeniferus) feeding on catfish in waterhole, wide angle view. Maasai Mara National Reserve, Kenya.
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Anup Shah / Marabou storks (Leptoptilos crumeniferus) feeding on catfish in waterhole, wide angle view. Maasai Mara National Reserve, Kenya.
Selfoss waterfall in autumn with snow, north Iceland, September 2013.
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Peter Cairns / Selfoss waterfall in autumn with snow, north Iceland, September 2013.
Eurasian beaver (Castor fiber) entering the River Otter after release. Part of escaped population re-released to the wild following veterinary check ups. Taken on the second day of Beaver releases aft...
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Nick Upton / Eurasian beaver (Castor fiber) entering the River Otter after release. Part of escaped population re-released to the wild following veterinary check ups. Taken on the second day of Beaver releases aft...
Eurasian beaver (Castor fiber) swimming in River Otter after release. Part of escaped population re-released to the wild following veterinary check ups. Taken on the second day of Beaver releases afte...
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Nick Upton / Eurasian beaver (Castor fiber) swimming in River Otter after release. Part of escaped population re-released to the wild following veterinary check ups. Taken on the second day of Beaver releases afte...
Two Yellow-eyed penguin (Megadyptes antipodes) chicks standing together. Otago Peninsula, Otago, South Island, New Zealand, January. Endangered Species.
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Andy Trowbridge / Two Yellow-eyed penguin (Megadyptes antipodes) chicks standing together. Otago Peninsula, Otago, South Island, New Zealand, January. Endangered Species.
Cape buffalo (Syncerus caffer) crossing the Chobe River, followed by swarm of flies, Chobe Game Reserve, Botswana, Africa.
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Ann & Steve Toon / Cape buffalo (Syncerus caffer) crossing the Chobe River, followed by swarm of flies, Chobe Game Reserve, Botswana, Africa.
Autumnal landscape with snow, Arrigetch Peaks region of Brooks Range, Gates of the Arctic National Park, Alaska, USA, August 2014.
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Floris van Breugel / Autumnal landscape with snow, Arrigetch Peaks region of Brooks Range, Gates of the Arctic National Park, Alaska, USA, August 2014.
Ice cave melting in Mendenhall Glacier, Juneau, Alaska, USA, August 2014.
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Floris van Breugel / Ice cave melting in Mendenhall Glacier, Juneau, Alaska, USA, August 2014.
Nile crocodile (Crocodylus niloticus) making its way through sand  to the Rufiji River, Selous Game Reserve, Tanzania.
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Charlie Summers / Nile crocodile (Crocodylus niloticus) making its way through sand to the Rufiji River, Selous Game Reserve, Tanzania.
Pine marten (Martes martes) walking along edge of water, orange glow in sky behind from the lights of Inverness. Black Isle, Scotland, UK, September. Photographed by camera trap.
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Terry Whittaker / Pine marten (Martes martes) walking along edge of water, orange glow in sky behind from the lights of Inverness. Black Isle, Scotland, UK, September. Photographed by camera trap.
Young Water voles (Arvicola amphibius) on old pump wheel, Kent, UK, October.
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Terry Whittaker / Young Water voles (Arvicola amphibius) on old pump wheel, Kent, UK, October.
Black caiman (Melanosuchus niger) on shore, Ibera Marshes, Corrientes Province, Argentina
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Gabriel Rojo / Black caiman (Melanosuchus niger) on shore, Ibera Marshes, Corrientes Province, Argentina
Takob-Akob Falls plunging 38 metres through the rainforest. Southern plateau edge, Maliau Basin, Sabah, Borneo, May 2011.
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Alex Hyde / Takob-Akob Falls plunging 38 metres through the rainforest. Southern plateau edge, Maliau Basin, Sabah, Borneo, May 2011.
River Brue, at dawn with Glastonbury Tor in background,  Somerset, UK, August.
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John Waters / River Brue, at dawn with Glastonbury Tor in background, Somerset, UK, August.
Light trails of Japanese fireflies (Hotaria parvula and Luciola cruciata), Nichinan-chou, Tottori, Japan, July, Endemic species.
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Yukihiro Fukuda / Light trails of Japanese fireflies (Hotaria parvula and Luciola cruciata), Nichinan-chou, Tottori, Japan, July, Endemic species.
Karo boys with decorative skin painting. Karo tribe, Omo river, Ethiopia, November 2014
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Enrique Lopez-Tapia / Karo boys with decorative skin painting. Karo tribe, Omo river, Ethiopia, November 2014
Karo boys with decorative skin painting.Territory of the Karo tribe. Omo river. Ethiopia, November 2014
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Enrique Lopez-Tapia / Karo boys with decorative skin painting.Territory of the Karo tribe. Omo river. Ethiopia, November 2014
Red-Crowned Crane (Grus japonensis) flock roosting in icy river in winter, Tsurui, Hokkaido, Japan. February.
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Aflo / Red-Crowned Crane (Grus japonensis) flock roosting in icy river in winter, Tsurui, Hokkaido, Japan. February.
Hiker crossing  Newton Creek, Elk Meadows Trail, Mount Hood Wilderness.  Oregon, USA, July 2014.  Model released.
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Kirkendall-Spring / Hiker crossing Newton Creek, Elk Meadows Trail, Mount Hood Wilderness. Oregon, USA, July 2014. Model released.
Hikers on the trail to Three Fingered Jack, Mount Jefferson Wilderness, Duschutes National Forest.  Oregon, USA, July 2014. Model released.
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Kirkendall-Spring / Hikers on the trail to Three Fingered Jack, Mount Jefferson Wilderness, Duschutes National Forest. Oregon, USA, July 2014. Model released.
Bonobo (Pan paniscus) foraging in river, Lola Ya Bonobo Sanctuary, Democratic Republic of the Congo.  Non-ex
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Cyril Ruoso / Bonobo (Pan paniscus) foraging in river, Lola Ya Bonobo Sanctuary, Democratic Republic of the Congo. Non-ex
Wangi Falls at night illuminated by moonlight, Litchfield National Park, Northern Territory, Australia. December 2012.
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Jurgen Freund / Wangi Falls at night illuminated by moonlight, Litchfield National Park, Northern Territory, Australia. December 2012.
Chatham stream on the main Chatham island, New Zealand, March 2014.
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Ole Jorgen Liodden / Chatham stream on the main Chatham island, New Zealand, March 2014.
Black and white photograph of Ice crystals up to 12 inches long along a small creek in a remote valley, Brooks Range, Gates of the Arctic National Park, Alaska, August 2014.
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Floris van Breugel / Black and white photograph of Ice crystals up to 12 inches long along a small creek in a remote valley, Brooks Range, Gates of the Arctic National Park, Alaska, August 2014.
Ice cave with melt water running through, Mendenhall Glacier, Juneau, Alaska, USA, August 2014.
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Floris van Breugel / Ice cave with melt water running through, Mendenhall Glacier, Juneau, Alaska, USA, August 2014.
Grizzly bear (Ursus arctos horribilis) charging through river chasing salmon, Alaska, USA. Crop of 01500299.
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Andy Rouse / Grizzly bear (Ursus arctos horribilis) charging through river chasing salmon, Alaska, USA. Crop of 01500299.
Salto Grande waterfall with Paine Grande beyond, Torres del Paine National Park, Chile, June 2014.
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Floris van Breugel / Salto Grande waterfall with Paine Grande beyond, Torres del Paine National Park, Chile, June 2014.
Aerial view of river and swans, South West Iceland, June 2014.
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Pal Hermansen / Aerial view of river and swans, South West Iceland, June 2014.
Aerial view of river delta and coast, South West Iceland, June 2014.
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Pal Hermansen / Aerial view of river delta and coast, South West Iceland, June 2014.
Aerial view of river delta, South West Iceland, June 2014. Finalist in the Art of Nature Category of the Big Picture Competition 2015.
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Pal Hermansen / Aerial view of river delta, South West Iceland, June 2014. Finalist in the Art of Nature Category of the Big Picture Competition 2015.
Aerial view of river delta, South West Iceland, June 2014.
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Pal Hermansen / Aerial view of river delta, South West Iceland, June 2014.
Aerial view of river delta, South West Iceland, June 2014.
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Pal Hermansen / Aerial view of river delta, South West Iceland, June 2014.
Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River. Maasai Mara National Reserve, Kenya.
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Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River. Maasai Mara National Reserve, Kenya.
Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River. Maasai Mara National Reserve, Kenya.
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Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River. Maasai Mara National Reserve, Kenya.
Common or plains zebra (Equus quagga burchelli) and Eastern White-bearded Wildebeest (Connochaetes taurinus) mixed herd crossing the Mara River. Maasai Mara National Reserve, Kenya.
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Anup Shah / Common or plains zebra (Equus quagga burchelli) and Eastern White-bearded Wildebeest (Connochaetes taurinus) mixed herd crossing the Mara River. Maasai Mara National Reserve, Kenya.
Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River. Maasai Mara National Reserve, Kenya.
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Anup Shah / Eastern White-bearded Wildebeest (Connochaetes taurinus) herd crossing the Mara River. Maasai Mara National Reserve, Kenya.
Common or plains zebra (Equus quagga burchelli) and Eastern White-bearded Wildebeest (Connochaetes taurinus) mixed herd crossing the Mara River. Maasai Mara National Reserve, Kenya.
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Anup Shah / Common or plains zebra (Equus quagga burchelli) and Eastern White-bearded Wildebeest (Connochaetes taurinus) mixed herd crossing the Mara River. Maasai Mara National Reserve, Kenya.
Yellow Anaconda (Eunectes notaeus) in vegetation at the edge of the Paraguay River, Taiama Reserve, western Pantanal, Brazil, South America.
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Nick Garbutt / Yellow Anaconda (Eunectes notaeus) in vegetation at the edge of the Paraguay River, Taiama Reserve, western Pantanal, Brazil, South America.
Purple bergenia (Bergenia purpurascens) in flower, Kawakarpo Mountain, Meri Snow Mountain National Park, Yunnan Province, China.
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Dong Lei / Purple bergenia (Bergenia purpurascens) in flower, Kawakarpo Mountain, Meri Snow Mountain National Park, Yunnan Province, China.
Dawn over the mountains and Nam Song River at Vang Vieng, Laos, March 2009.
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David Noton / Dawn over the mountains and Nam Song River at Vang Vieng, Laos, March 2009.
People crossing a footbridge over the Nam Khan River, Luang Prabang, Laos, March 2009.
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David Noton / People crossing a footbridge over the Nam Khan River, Luang Prabang, Laos, March 2009.
Canoes on the moored on the  Nam Song River at Vang Vieng, Laos, March 2009.
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David Noton / Canoes on the moored on the Nam Song River at Vang Vieng, Laos, March 2009.