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Morning Glory Pool, a geothermal pool, colours are due to algae at temperature bands, hotter below, Yellowstone National Park, Wyoming, USA
Waterfall in the Grand Canyon, Yellowstone National Park, Wyoming, USA
Coyote (Canis latrans), weighing 30-40 lbs, less than half the weight of a wolf, Yellowstone National Park, Wyoming, USA
Winter landscape, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Regenerating trees reflected in a frosty and misty Lewis River at dawn, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Turban, Vent and Grand Geysers erupt, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Bison (Bison bison), Hayden Valley, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Morning Glory Pool and surrounds, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Cold tourists on seat surrounded by steam, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Dead trees and steam with mountain backdrop and blue skies, Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Fallen lodgepole pines, Grand Prismatic Spring, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Fishing Cone Geyser with freezing mists, Yellowstone Lake at West Thumb Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Black bear (Ursus americanus) sow nursing a spring cub, Yellowstone National Park, 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
Two bison (Bison bison) bulls facing off, Yellowstone National Park, Wyoming, United States of America, North America
Red Fox (Vulpes vulpes) (Vulpes fulva) vixen and kit, Yellowstone National Park, Wyoming, United States of America, North America
Three Grizzly Bear (Ursus arctos horribilis) cubs of the year, Yellowstone National Park, Wyoming, United States of America, North America
Great gray owl (great grey owl) (Strix nebulosa) adult leaving a perch, Yellowstone National Park, Wyoming, United States of America, North America
Great gray owl (great grey owl) (Strix nebulosa) female and 8-day-old chick, Yellowstone National Park, Wyoming, United States of America, North America
Red fox (Vulpes vulpes) (Vulpes fulva) vixen hunting a bird, Yellowstone National Park, 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
Grizzly bear (Ursus arctos horribilis), 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
Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grizzly bear (Ursus arctos horribilis), Yellowstone National Park, Wyoming, United States of America, North America
Two Pronghorn (Antilocapra americana) bucks sparring, Yellowstone National Park, Wyoming, United States of America, North America
Three American avocet (Recurvirostra americana), Yellowstone National Park, Wyoming, United States of America, North America
Yellow-bellied marmot (yellowbelly marmot) (Marmota flaviventris) carrying a pup, Yellowstone National Park, Wyoming, United States of America, North America
Yellow-bellied marmot (yellowbelly marmot) (Marmota flaviventris) carrying a pup, Yellowstone National Park, 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
Pool runoff of orange bacteria and algae (Therophiles), Grand Prismatic Pool, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Yellow-bellied marmot (yellowbelly marmot) (Marmota flaviventris) carrying a pup, Yellowstone National Park, Wyoming, United States of America, North America
Uinta chipmunk (Tamias umbrinus), Yellowstone National Park, Wyoming, United States of America, North America
Bison (Bison bison) cow and calf in the spring, Yellowstone National Park, UNESCO World Heritage Site, 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
Bison (Bison bison) covered with snow in the winter, Yellowstone National Park, Wyoming, United States of America, North America
Bison (Bison bison) cow and newborn calf, Yellowstone National Park, Wyoming, United States of America, North America
Coyote (Canis latrans) in winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Turban, Vent and Grand Geysers erupt, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, 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
Bison (Bison bison) cow and calf in the spring, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Black Bear (Ursus americanus) sow and yearling cub playing, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Bison grazing in Yellowstone National Park, Wyoming, USA
Bull moose beside Yellowstone Lake, Yellowstone National Park, Wyoming, USA, North America
Tourists on boardwalk in silhouette, Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Red fox (Vulpes vulpes) (Vulpes fulva) kit pouncing on its sibling, 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) covered with snow in the winter, Yellowstone National Park, Wyoming, United States of America, North America
Bison (Bison bison) bull and cow, Yellowstone National Park, Wyoming, United States of America, North America
Grizzly Bear (Ursus arctos horribilis), yearling cub, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Lower Falls, Yellowstone River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Uinta Ground Squirrel (Urocitellus armatus) among Mountain Bluebell (Mertensia ciliata), 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
Bison (Bison bison) bull in the spring, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Elk herd, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Common raven (Corvus corax) feeding on a duck, Yellowstone National Park, 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
Black bear (Ursus americanus) in a spring snow storm, Yellowstone National Park, Wyoming, United States of America, North America
Bison (Bison bison) bull in a spring snowstorm, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Grizzly Bear (Ursus arctos horribilis) sow and two cubs of the year or spring cubs standing, Yellowstone National Park, Wyoming, United States of America, North America
Cliff Geyser erupts from geyserite bank on edge of Firehole River through Black Sand Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Lone Star Geyser erupts and creates rainbow, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
River Otter (Lutra canadensis) pup, Yellowstone National Park, Wyoming, United States of America, North America
Grizzly bear (Ursus arctos horribilis) sow and two cubs of the year all standing up on their hind legs, Yellowstone National Park, Wyoming, United States of America, North America
Black bear (Ursus americanus) sow and cub of the year, Yellowstone National Park, Wyoming, United States of America, North America
Bison, Yellowstone National Park, Wyoming, USA
Walkway, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America
Young elk (Cervus canadensis), crossing amongst traffic along the Madison River, Yellowstone National Park, Wyoming, United States of America, North America
Monk praying, and Sai-Sin (sacred thread) in use in Buddhist ceremony, International Buddhist Center of Geneva, Geneva, Switzerland, Europe
Daisy Geyser, one of the most predictable, erupts at an angle, Upper Geyser Basin, 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
Visitors, steam and vivid colours, Grand Prismatic Spring, 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
River Otter (Lutra canadensis) pups, Yellowstone National Park, Wyoming, United States of America, North America
Black Bear (Ursus americanus) sow and cub, Yellowstone National Park, Wyoming, United States of America, North America
Cinnamon Black Bear (Ursus americanus) yearling cub, Yellowstone National Park, Wyoming, United States of America, North America
Old Faithful geyser blowing, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
Black Bear (Ursus americanus) sow and yearling cub playing, 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
Chromatic Pool and surrounds on a clear day, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, 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
Uinta Ground Squirrel (Urocitellus armatus) among Mountain Bluebell (Mertensia ciliata), Yellowstone National Park, 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) bull covered with frost in the winter, Yellowstone National Park, Wyoming, United States of America, North America
Bison (Bison bison), Yellowstone National Park, Wyoming, United States of America, North America
Grizzly Bear (Ursus arctos horribilis), yearling cub, Yellowstone National Park, Wyoming, United States of America, North America
Bison (Bison bison) calf, Yellowstone National Park, 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
Tourist taking a photograph of Grand Prismatic Spring, Midway Geyser Basin, 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
Badger (Taxidea taxus), 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
Porcelain Basin, Norris Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, 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
Black Bear (Ursus americanus), Yellowstone National Park, Wyoming, United States of America, North America
Grizzly Bear (Ursus arctos horribilis) sow and two cubs of the year or spring cubs standing, 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
Grizzly Bear (Ursus arctos horribilis), yearling cub, 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