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Amerique du nord - Greater Yellowstone Ecosystem (137) Images supplémentaires...
Created in 1872, Yellowstone was the very first national park in the world. It is the centerpiece of the 20 million acre Greater Yellowstone Ecosystem, a region that includes Grand Teton National Park and adjacent National Forests. Considered to be the world's largest intact ecosystem in the northern temperate zone, Yellowstone is well-known for its wildlife and is the most popular megafauna location in the Continental United States, occupied by grizzly bears, wolves, bison and elk. It is located primarily in Wyoming but extends into Montana and Idaho.

Yellowstone has many types of ecosystems, including subalpine forest, mountain ranges, canyons, lakes and rivers. The topography has been shaped by lava flows and volcanic rocks from the still-active Yellowstone Caldera, the largest sup
Canadian river otter (Lutra canadensis) on a log enjoying its evening meal of a Cutthroat trout, starting at the tail. Trout Lake, Yellowstone National Park, Wyoming, USA, June. Winner of the Amateur...
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Diane McAllister / Canadian river otter (Lutra canadensis) on a log enjoying its evening meal of a Cutthroat trout, starting at the tail. Trout Lake, Yellowstone National Park, Wyoming, USA, June. Winner of the Amateur...
Mountain bluebird (Sialia currucoides) pair, Grand Teton National Park, Wyoming, USA, May
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George Sanker / Mountain bluebird (Sialia currucoides) pair, Grand Teton National Park, Wyoming, USA, May
Bald Eagle (Haliaeetus leucocephalus) perched on broken tree trunk, Yellowstone National Park, Montana, USA
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George McCarthy / Bald Eagle (Haliaeetus leucocephalus) perched on broken tree trunk, Yellowstone National Park, Montana, USA
Mule deer {Odocoileus hemionus} buck portrait, Grand Teton NP, Wyoming, USA
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Rolf Nussbaumer / Mule deer {Odocoileus hemionus} buck portrait, Grand Teton NP, Wyoming, USA
Buck Pronghorn Antelope (Antilocapra americana) Yellowstone National Park, Montana, USA
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George McCarthy / Buck Pronghorn Antelope (Antilocapra americana) Yellowstone National Park, Montana, USA
Coyote {Canis latrans} hunting Ground squirrels in grassland, Yellowstone NP, Montana, USA
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George McCarthy / Coyote {Canis latrans} hunting Ground squirrels in grassland, Yellowstone NP, Montana, USA
Elk (Cervus canadensis) calf in Spring, Yellowstone National Park, Montana, USA
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George McCarthy / Elk (Cervus canadensis) calf in Spring, Yellowstone National Park, Montana, USA
Golden manteled ground squirrel (Spermophilus lateralis) holding its tail. Yellowstone National Park, Wyoming, USA, May
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Diane McAllister / Golden manteled ground squirrel (Spermophilus lateralis) holding its tail. Yellowstone National Park, Wyoming, USA, May
Least chipmunk on pine stump {Eutamias minimus} Yellowstone NP, USA
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Pete Cairns / Least chipmunk on pine stump {Eutamias minimus} Yellowstone NP, USA
RF- Uinta Ground Squirrel (Spermophilus armatus) calling in alarm as warning to others. Yellowstone National Park, USA. (This image may be licensed either as rights managed or royalty free.)
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Peter Cairns / RF- Uinta Ground Squirrel (Spermophilus armatus) calling in alarm as warning to others. Yellowstone National Park, USA. (This image may be licensed either as rights managed or royalty free.)
Yellow-bellied marmot (Marmota Flaviventris) peering out from rocks where they make their den, Yellowstone National Park, Wyoming, USA
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Pete Cairns / Yellow-bellied marmot (Marmota Flaviventris) peering out from rocks where they make their den, Yellowstone National Park, Wyoming, USA
Black tailed prairie dog (Cynomys ludovicianus) alert female, Custer State Park, South Dakota, USA
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Thomas Lazar / Black tailed prairie dog (Cynomys ludovicianus) alert female, Custer State Park, South Dakota, USA
Snow shoeing / Cross country skiing on Two Ocean Mountain, Togwotee Pass, Shoshone National Forest, Wyoming, USA, December 2008
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Jeff Vanuga / Snow shoeing / Cross country skiing on Two Ocean Mountain, Togwotee Pass, Shoshone National Forest, Wyoming, USA, December 2008
Sunrise along the Yellowstone River beyond frosted grasses. Yellowstone National Park, Wyoming, October 2008.
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Jeff Vanuga / Sunrise along the Yellowstone River beyond frosted grasses. Yellowstone National Park, Wyoming, October 2008.
Elk graze in winter beside Lodgepole pine forest destroyed by forest fire, Yellowstone NP, Wyoming, USA. 1988
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Steven Fuller / Elk graze in winter beside Lodgepole pine forest destroyed by forest fire, Yellowstone NP, Wyoming, USA. 1988
Steam rising from Blue Funnel Spring, West Thumb Geyser Basin, Yellowstone National Park, Wyoming, USA, January 2008
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Jeff Vanuga / Steam rising from Blue Funnel Spring, West Thumb Geyser Basin, Yellowstone National Park, Wyoming, USA, January 2008
Bighorn sheep (Ovis canadensis) ram, portrait, Yellowstone NP, Wyoming, USA, January
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Patricio Robles Gil / Bighorn sheep (Ovis canadensis) ram, portrait, Yellowstone NP, Wyoming, USA, January
Rocky Mountain Bighorn (Ovis canadensis) portrait of ram displaying Flehman grimace to tell if a Ewe has come into estrous, McMinn Plateau,Yellowstone National Park, Wyoming, USA
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Charlie Summers / Rocky Mountain Bighorn (Ovis canadensis) portrait of ram displaying Flehman grimace to tell if a Ewe has come into estrous, McMinn Plateau,Yellowstone National Park, Wyoming, USA
Bighorn sheep {Ovis canadensis} Yellowstone NP, USA
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Niall Benvie / Bighorn sheep {Ovis canadensis} Yellowstone NP, USA
Rocky Mountain Bighorn Sheep {Ovis canadensis} male following female at rut, Whiskey Basin Sheep Range, Shoshone National Forest, near Dubois, Wyoming, USA, November
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Jeff Vanuga / Rocky Mountain Bighorn Sheep {Ovis canadensis} male following female at rut, Whiskey Basin Sheep Range, Shoshone National Forest, near Dubois, Wyoming, USA, November
Tourists on boardwalk looking at thermophile mats, formed by algae, bacteria and other heat loving micro-organisms, Black Sand Basin, Yellowstone
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Philippe Clement / Tourists on boardwalk looking at thermophile mats, formed by algae, bacteria and other heat loving micro-organisms, Black Sand Basin, Yellowstone
Tourists silhouetted on boardwalk at Midway Geyser Basin. Yellowstone National Park, Wyoming, USA, September.
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Peter Cairns / Tourists silhouetted on boardwalk at Midway Geyser Basin. Yellowstone National Park, Wyoming, USA, September.
Trees covered with frost from the hot springs. Yellowstone National Park, USA, 1996.
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Bryan and Cherry Alexander / Trees covered with frost from the hot springs. Yellowstone National Park, USA, 1996.
Travertine terraces at Mammoth Hot Springs, Yellowstone NP, Wyoming, USA
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Kirkendall-Spring / Travertine terraces at Mammoth Hot Springs, Yellowstone NP, Wyoming, USA
Grizzly bear (Ursus arctos horribilis) standing on hind legs, Yellowstone National Park, Wyoming, USA, June
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George Sanker / Grizzly bear (Ursus arctos horribilis) standing on hind legs, Yellowstone National Park, Wyoming, USA, June
Male Black bear (Ursus americanus) scratching back against tree trunk, leaving scent during mating season, Yellowstone National Park, Wyoming, USA, June
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George Sanker / Male Black bear (Ursus americanus) scratching back against tree trunk, leaving scent during mating season, Yellowstone National Park, Wyoming, USA, June
Female Black bear (Ursus americanus) on fallen tree yawning (warning behaviour), Yellowstone National Park, Wyoming, USA, May
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George Sanker / Female Black bear (Ursus americanus) on fallen tree yawning (warning behaviour), Yellowstone National Park, Wyoming, USA, May
Male Black bear (Ursus americanus) mud bathing, Yellowstone National Park, Wyoming, USA, June
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George Sanker / Male Black bear (Ursus americanus) mud bathing, Yellowstone National Park, Wyoming, USA, June
Black bear (Ursus americanus) mother and female cub playing on forest floor, Yellowstone National Park, Wyoming, USA, May
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George Sanker / Black bear (Ursus americanus) mother and female cub playing on forest floor, Yellowstone National Park, Wyoming, USA, May
Black bear (Ursus americanus) cub in tree, Yellowstone National Park, Wyoming, USA, May
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George Sanker / Black bear (Ursus americanus) cub in tree, Yellowstone National Park, Wyoming, USA, May
Bison {Bison bison} Grand Teton National Park, Wyoming, USA
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David Kjaer / Bison {Bison bison} Grand Teton National Park, Wyoming, USA
Bison calf (Bison bison) nursing from its mother in Yellowstone National Park. Wyoming, USA, May
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Diane McAllister / Bison calf (Bison bison) nursing from its mother in Yellowstone National Park. Wyoming, USA, May
Bison (Bison bison) calf in summer meadow, Yellowstone National Park, Wyoming, USA
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Pete Cairns / Bison (Bison bison) calf in summer meadow, Yellowstone National Park, Wyoming, USA
Bison head portrait covered in snow. (Bison bison) Yellowstone NP.
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TOM MANGELSEN / Bison head portrait covered in snow. (Bison bison) Yellowstone NP.
Coyote (Canis latrans) mother and pup at den entrance in snow, Yellowstone National Park, Wyoming, USA, May
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George Sanker / Coyote (Canis latrans) mother and pup at den entrance in snow, Yellowstone National Park, Wyoming, USA, May
Dusky Grouse {Dendragapus obscurus} female, Yellowstone NP, Montana, USA
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George McCarthy / Dusky Grouse {Dendragapus obscurus} female, Yellowstone NP, Montana, USA
Great Grey Owl in tree (Strix nebulosa) Yellowstone NP Wyoming, USA.
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Mary McDonald / Great Grey Owl in tree (Strix nebulosa) Yellowstone NP Wyoming, USA.
Dead pine amongst travertine, a feature of hot springs. YelloWstone NP, Wyoming, USA
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Niall Benvie / Dead pine amongst travertine, a feature of hot springs. YelloWstone NP, Wyoming, USA
American Elk (Cervus elaphus) Mammoth area. Yellowstone NP, Wyoming, USA.
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TOM MANGELSEN / American Elk (Cervus elaphus) Mammoth area. Yellowstone NP, Wyoming, USA.
North American pika {Ochotona princeps} Grand Teton NP, Wyoming, USA.
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Philippe Clement / North American pika {Ochotona princeps} Grand Teton NP, Wyoming, USA.
American bison (Bison bison) herd roaming the plains, Custer State Park, South Dakota, USA, September
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Charlie Summers / American bison (Bison bison) herd roaming the plains, Custer State Park, South Dakota, USA, September