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Bull elk (Cervus canadensis) eating pine needles, Yellowstone National Park, Wyoming, United States of America, North America
Firehole Spring, Firehole Lake Drive, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Fog among a hillside with evergreens, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Tourists watching Old Faithful Geyser, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Upper Falls, Yellowstone River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Cinnamon black bear (Ursus americanus), Yellowstone National Park, Wyoming, United States of America, North America
Yellow-headed blackbird (Xanthocephalus xanthocephalus), Yellowstone National Park, Wyoming, United States of America, North America
Fog mingling with evergreen trees with some cottonwoods, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Cinnamon black bear (Ursus americanus), Yellowstone National Park, Wyoming, United States of America, North America
Bison (Bison bison), Yellowstone National Park, Wyoming, United States of America, North America
Yellowstone River and Falls, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellowstone Falls and canyon, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Elk, Yellowstone National Park, Wyoming, USA
Geothermal steam, frosted trees and snow-free hot ground in Norris Basin in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Freezing mists, dawn, West Thumb Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Dead tree trunks, Canary Spring, top Main Terrace, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Castle Geyser erupting, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Black bear (Ursus americanus) sow and two cinnamon yearling cubs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Fog mingling with evergreen trees, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Male yellow-headed blackbird (Xanthocephalus xanthocephalus) dislaying, Yellowstone National Park, Wyoming, United States of America, North America
Bison (Bison bison) cow and calf, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Bison (Bison bison) bull covered with snow in snowfall in the winter, Yellowstone National Park, Wyoming, United States of America, North America
Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Cinnamon Black Bear (Ursus americanus) yearling cub climbing a tree, Yellowstone National Park, Wyoming, United States of America, North America
Three bald eagle (Haliaeetus leucocephalus) in an evergreen tree, Yellowstone National Park, Wyoming, United States of America, North America
Grizzly bear (Ursus arctos horribilis) sow and three cubs of the year, Yellowstone National Park, Wyoming, United States of America, North America
Detail of Gibbon Falls, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellow pine chipmunk (Eutamias amoenus) eating a grass head, Yellowstone National Park, Wyoming, United States of America, North America
Turquoise Pool, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grizzly bear (Ursus arctos horribilis) resting, Yellowstone National Park, Wyoming, United States of America, North America
Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Red Fox (Vulpes vulpes) (Vulpes fulva) vixen and two kits, Yellowstone National Park, Wyoming, United States of America, North America
Grizzly Bear (Ursus arctos horribilis), Yellowstone National Park, Wyoming, United States of America, North America
Bison (Bison bison) cow and calf, Yellowstone National Park, Wyoming, United States of America, North America
Black bear (Ursus americanus) cub of the year or spring cub, Yellowstone National Park, Wyoming, United States of America, North America
Bighorn sheep (Ovis canadensis) ram eating in the winter, Yellowstone National Park, Wyoming, United States of America, North America
Gray wolf (Canis lupus) 755M of the Lamar Canyon Pack running through the snow in the winter, Yellowstone National Park, Wyoming, United States of America, North America
Fumaroles (steam vents) in Porcelain Basin, Norris Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Bison (Bison bison) bull demonstrating the flehmen response, Yellowstone National Park, Wyoming, United States of America, North America
Female Williamson's sapsucker (Sphyrapicus thyroideus) at its nest hole, Yellowstone National Park, Wyoming, United States of America, North America
Cinnamon black bear (Ursus americanus), Yellowstone National Park, Wyoming, United States of America, North America
Bison (Bison bison) bull covered with snow in the winter, Yellowstone National Park, Wyoming, United States of America, North America
Black bear (Ursus americanus) sow and three cubs of the year, Yellowstone National Park, Wyoming, United States of America, North America
Pink clouds at dawn in the winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Coyote (Canis latrans) in the snow in winter, Yellowstone National Park, Wyoming, United States of America, North America
Rainbow cast by eruption of Riverside Geyser, Firehole River, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Sawmill Geyser erupts, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Mud Volcano Area, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Black Bear (Ursus americanus) cub of the year climbing a tree, Yellowstone National Park, Wyoming, United States of America, North America
Female Barrow's Goldeneye (Bucephala islandica), Yellowstone National Park, Wyoming, United States of America, North America
Bull elk, Cervus canadensis, with curious photographers, Yellowstone National Park, Wyoming, USA
Grizzly bear (Ursus arctos horribilis), Yellowstone National Park, Wyoming, United States of America, North America
Great gray owl (great grey owl) (Strix nebulosa) chicks, one 25 and one between 22 and 24 days old, Yellowstone National Park, Wyoming, United States of America, North America
Female mountain bluebird (Sialia currucoides) with an insect, Yellowstone National Park, Wyoming, United States of America, North America
Grizzly bear (Ursus arctos horribilis), Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
River Otter (Lutra canadensis) on frozen Yellowstone Lake, Yellowstone National Park, Wyoming, United States of America, North America
Barrow's Goldeneye (Bucephala islandica) swimming, Yellowstone National Park, Wyoming, United States of America, North America
Bison (Bison bison) cows grazing, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Norris Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Two Black Bear (Ursus americanus) cubs of the year or spring cubs playing, Yellowstone National Park, Wyoming, United States of America, North America
Elk, Yellowstone National Park, Wyoming, USA
Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Female tourist on boardwalk by the Morning Glory Pool, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Male Mountain Bluebird (Sialia currucoides) with food at the nest, Yellowstone National Park, Wyoming, United States of America, North America
Coyote (Canis latrans), Yellowstone National Park, Wyoming, United States of America, North America
Black bear (Ursus americanus) sow and two yearling cubs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Black bear (Ursus americanus) cub of the year or spring cub in a tree, Yellowstone National Park, Wyoming, United States of America, North America
Black bear (Ursus americanus) cub of the year or spring cub climbing a tree, Yellowstone National Park, Wyoming, United States of America, North America
Two girls with parasols in Burnt Forest, Yellowstone National Park, Wyoming, United States of America, North America
Male Williamson's sapsucker (Sphyrapicus thyroideus) at its nest hole, Yellowstone National Park, Wyoming, United States of America, North America
Morning Glory Pool in Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
American Kestrel (Sparrow Hawk) (Falco sparverius), male, Yellowstone National Park, Wyoming, United States of America, North America
Castle Geyser, Upper Geyser Basin, Yellowstone National Park, Wyoming, USA
Emerald Pool, Black Sand Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Top of the Lower Falls from Lookout Point at sunrise, Grand Canyon of the Yellowstone, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Eruption of Riverside Geyser seen from Firehole River bridge, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Erupting geyser and Old Faithful Inn, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Bright colours and steam, Grand Prismatic Spring, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Line of Bison (Bison bison) crossing the Lamar River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Osprey (Pandion haliaetus) along the Madison River, Yellowstone National Park, Wyoming, United States of America, North America
Female Williamson's sapsucker (Sphyrapicus thyroideus), Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grizzly bear (Ursus arctos horribilis), Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellow-bellied marmot (yellowbelly marmot) (Marmota flaviventris) with nesting material, Yellowstone National Park, Wyoming, United States of America, North America
Yellow pine chipmunk (Eutamias amoenus), Yellowstone National Park, Wyoming, United States of America, North America
Young bison (Bison bison), Yellowstone National Park, Wyoming, United States of America, North America
Coyote (Canis latrans) in the snow, Yellowstone National Park, Wyoming, United States of America, North America
Young mule deer (Odocoileus hemionus) in a snow storm in the Spring, Yellowstone National Park, Wyoming, United States of America, North America
Black bear (Ursus americanus) sow and three cubs of the year, Yellowstone National Park, Wyoming, United States of America, North America
Grizzly bear (Ursus arctos horribilis) in the snow in the spring, Yellowstone National Park, Wyoming, United States of America, North America
Black Bear (Ursus americanus) cub of the year or spring cub, Yellowstone National Park, Wyoming, United States of America, North America
Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Pronghorn (Antilocapra americana) buck, Yellowstone National Park, Wyoming, United States of America, North America
Badger (Taxidea taxus), Yellowstone National Park, Wyoming, United States of America, North America
Male Audubon's Yellow-Rumped Warbler (Dendroica coronata auduboni), Yellowstone National Park, Wyoming, United States of America, North America
Mountain bluebird (Sialia currucoides) pair at their nest, Yellowstone National Park, Wyoming, United States of America, North America
Grizzly bear (Ursus arctos horribilis) sow and two cubs of the year, Yellowstone National Park, Wyoming, United States of America, North America
Riverside Geyser, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America