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Moose (Alces alces) cow in pond breaks from filter feeding and stares at camera, Grand Teton National Park, 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

Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Boulders and granite hills, Alabama Hills, Inyo National Forest, California, United States of America, North America

Mountain bluebird (Sialia currucoides) pair at their nest, Yellowstone National Park, Wyoming, United States of America, North America

The Teton Range at dawn after a fresh snow, Grand Teton National Park, Wyoming, United States of America, North America

Bull elk (Cervus canadensis) feeding in the winter, Yellowstone National Park, Wyoming, United States of America, North America

Bighorn sheep (Ovis canadensis) in the winter, Yellowstone National Park, Wyoming, United States of America, North America

Sandhill crane (Grus canadensis), Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Old wagon wheels with remnants of Fort Union behind, Fort Union National Monument, New Mexico, United States of America, North America

Scree field on the side of a sandstone butte, Capitol Reef National Park, Utah, United States of America, North America

The northern part of the Roosevelt National Park, North Dakota, United States of America, North America

Chaco Culture National Historic Park, World Heritage Site, Pueblo Bonito, kiva (foreground), UNESCO World Heritage Site, New Mexico, United States of America, North America

Red and orange maples and yellow aspens in the fall, Wasatch Mountain State Park, Utah, United States of America, North America

View from Cadillac Mountain, Acadia National Park, Mount Desert Island, Maine, New England, United States of America, North America

American robin (Turdus migratorius), Glacier National Park, Montana, United States of America, North America

Rosy paintbrush (split-leaf Indian paintbrush) (splitleaf Indian paintbrush) (Castilleja rhexifolia), San Juan National Forest, Colorado, United States of America, North America

Grizzly bear (Ursus arctos horribilis) pushing over a dead tree, Glacier National Park, Montana, United States of America, North America

Western meadowlark (Sturnella neglecta) singing, Yellowstone National Park, Wyoming, United States of America, North America

Grizzly bear (Ursus arctos horribilis) walking, Yellowstone National Park, Wyoming, United States of America, North America

Last light on Half Dome, photographed from Olmsted Point, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Lake Helen and Mount Lassen, 3187 meters, in the background, Lassen Volcanic National Park, California, United States of America, North America

Elk (Cervus canadensis) calf nursing, Yellowstone National Park, Wyoming, United States of America, North America

Common nighthawk (Chordeiles minor), Pawnee National Grassland, Colorado, United States of America, North America

Unicorn Peak rising above a mist shrouded forest, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Panorama across Lake Powell to Navajo Mountain and the Grand Staircase-Escalante National Monument, Page, Arizona, United States of America, North America

Sandstone formations under clouds, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Waves of Brain Rock, White Pocket, Vermilion Cliffs National Monument, Arizona, United States of America, North America

Clouds over Palisades at sunset, Uncompahgre National Forest, Colorado, United States of America, North America

Pink clouds at dawn over sandstone formations covered with a dusting of snow, Zion National Park, Utah, United States of America, North America

Granite mountains reflected in Tenaya Lake, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Norris Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Mount Moran in the winter with snow, Grand Teton National Park, Wyoming, United States of America, North America

Snow-covered mountain in the winter, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Yosemite Falls and Half Dome rock, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

American alligator (Alligator mississipiensis), Sanibel Island, J.N. Ding Darling National Wildlife Refuge, Florida, United States of America, North America

Visitors in the Giant Forest, Sequoia National Park, California, United States of America (U.S.A.), North America

Mammoth Hot Springs, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

The Mittens at dusk cast long shadows, Monument Valley Navajo Tribal Park, Utah and Arizona border, United States of America, North America

San Francisco de Asis Mission Church, National Historic Landmark, established 1772, Ranchos de Taos, New Mexico, United States of America, North America

Lava flowing from Kilauea Volcano, Hawaii Volcanoes National Park, UNESCO World Heritage Site, The Big Island, Hawaii, United States of America, North America

Woman watching sunset, Joshua Tree National Park, California, 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

Sandstone swirl under clouds, Coyote Buttes Wilderness, Vermillion Cliffs National Monument, Arizona, United States of America, North America

Sandstone wall with red and salmon layers and cracks, Vermillion Cliffs National Monument, Arizona, United States of America, North America

Johns Hopkins Glacier calving, Fairweather Range, Glacier Bay National Park and Preserve, Southeast Alaska, United States of America, North America

Orange clouds at sunset over orange and red maples in the fall, Uinta National Forest, Utah, United States of America, North America

Rippled gypsum, sand dunes in the White Sands National Monument, New Mexico, 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

Abyss Pool, West Thumb Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Tourists at Mather Point overlook, South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Gifford Farm House, Fruita, Capitol Reef National Park, Utah, United States of America, North America

Puebloans mud and stone granaries, Aztex Butte, Canyonlands National Park, Utah, United States of America, North America

Mountain goat (Oreamnos americanus) nanny resting, Mount Evans, Arapaho-Roosevelt National Forest, Colorado, United States of America, North America

Black bear (Ursus americanus) sow and two cubs-of-the-year, one nursing and one coming down from a tree, Yellowstone National Park, Wyoming, United States of America, North America

American avocet (Recurvirostra americana), Yellowstone National Park, Wyoming, United States of America, North America

Toadstool hoodoo, Grand Staircase-Escalante National Monument, Utah, United States of America, North America

Water reflections of the Teton Range, taken from the end of Schwabacker Road, Grand Teton National Park, Wyoming, United States of America, North America

Bull elk (Cervus canadensis), Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Badlands layers on a hazy morning, Badlands National Park, South Dakota, United States of America, North America

Two Grizzly Bear (Ursus arctos horribilis) cubs of the year or spring cubs playing, 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

Coyote (Canis latrans) in the snow in winter, Yellowstone National Park, Wyoming, United States of America, North America

Yosemite Falls beyond a flooded meadow in Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Faded murals on the Grand Hotel, National Historic District, Butte, Montana, United States of America, North America

Steller's jay (Cyanocitta stelleri), Rocky Mountain National Park, Colorado, United States of America, North America

Eruption of Riverside Geyser, Firehole River, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Regenerating trees reflected in a frosty and misty Lewis River, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Slump Block area in Theodore Roosevelt National Park North Unit, Watford, North Dakota, United States of America, North America

Red Fox (Vulpes vulpes) (Vulpes fulva), Yellowstone National Park, Wyoming, United States of America, North America

River otter (Lutra canadensis) mother and two pups, Yellowstone National Park, Wyoming, United States of America, North America

Grizzly bear (Ursus arctos horribilis) sow, Yellowstone National Park, Wyoming, United States of America, North America

Sandstone formations under clouds, Coyote Buttes Wilderness, Vermillion Cliffs National Monument, Arizona, United States of America, North America

Sandstone formation at dawn, Coyote Buttes Wilderness, Vermillion Cliffs National Monument, Arizona, United States of America, North America

North Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Bayside Trail, Cabrillo National Monument, San Diego, California, United States of America, North America

The Great Kiva, Aztec Ruins National Monument, UNESCO World Heritage Site, New Mexico, United States of America, North America

Small bush in the wash near a sandstone butte, Capitol Reef National Park, Utah, United States of America, North America

Johns Hopkins Glacier calving, Fairweather Range, Glacier Bay National Park and Preserve, Southeast Alaska, United States of America, North America

Panoramic photo of Court of the Patriarchs, Abraham Peak, Isaac Peak, Mount Moroni and Jacob Peak, Zion National Park, Utah, United States of America, North America