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Mules taking tourists along the Colorado River Trail, Grand Canyon, Arizona, United States of America, North America
Orange and yellow aspen leaves, White River National Forest, Colorado, United States of America, North America
Hiker on Longs Peak Trail, Rocky Mountain National Park, Colorado, United States of America, North America
Llamas at Laguna Colorado (Red Lake), Eduardo Avaroa Andean National Reserve, Bolivia, South America
Uinta chipmunk (Tamias umbrinus) eating, Grand Mesa National Forest, Colorado, United States of America, North America
Orange aspens in the fall among evergreens covered with snow at a lake, Grand Mesa National Forest, Colorado, United States of America, North America
Horseshoe Bend on the Colorado River, Page, Arizona, United States of America, North America
Shooting the rapids in a raft on the Colorado River, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Captive short-eared owl (Asio flammeus) in the snow, Boulder County, Colorado, United States of America, North America
Plateau and canyon country rising 2000 feet above the Grand Valley of the Colorado River, part of the Great Colorado Plateau, Colorado National Monument, Colorado, United States of America, North America
Pica (Pica pica), Clear Lake, San Juan National Forest, Colorado, United States of America, North America
Porphyry Basin Waterfall, San Juan National Forest, Colorado, United States of America, North America
Lost Lake at dawn in the fall, Grand Mesa-Uncompahgre-Gunnison National Forest, Colorado, United States of America, North America
Landscape of fields and farms with rock cliffs in the background, in Colorado, United States of America, North America
Uinta Chipmunk (Tamias umbrinus), Uncompahgre National Forest, Colorado, United States of America, North America
Navajo Bridges as seen from the Colorado River, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Colorado River viewed from the cliffs of Desert View Point at Grand Canyon South Rim, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Rock formation known as Swirls, on Colorado Plateau, Arizona, United States of America (U.S.A.), North America
Fall colors of aspens with evergreens, near Ouray, Colorado, Uninted States of America, North America
Dirt mountain road with aspens and cottonwoods in fall color, near Silver Jack, Uncompahgre National Forest, Colorado, United States of America, North America
Vail Ski Resort and the Gore Mountains, Vail, Colorado, United States of America, North America
Spruce Tree House Ruins, Pueblo ruins in Mesa Verde containing some of the most elaborte Pueblo dwellings found today, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America
The Vermilion Cliffs adjacent to Glen Canyon Recreation Area viewed from the plateau at the end of Spencer Trail in Marble Canyon with Lee's Ferry on the lower left with the Colorado River, Arizona, United States of America, North America
Sally lightfoot crab (Grapsus grapsus), moulted exoskeleton at Punta Colorado, Baja California Sur, Mexico, North America
Layers of yellow aspen and evergreen in the fall, White River National Forest, Colorado, United States of America, North America
The Cliff Palace Indian dwelling, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America
Shooting rapids in a kayak on the Colorado River, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
Rafters on the Colorado River through the Grand Canyon, Arizona, United States of America, North America
Horseshoe Bend, Glen Canyon, Colorado River, Arizona, United States of America, North America
Riverside Walk, Temple of Sinawava, Zion National Park, Colorado Plateau, Utah, United States of America, North America
Virgin River und Angel's Landing, Zion National Park, Colorado Plateau, Utah, United States of America, North America
An adult black spiny-tailed iguana (Ctenosaura similis), on the ground on Barro Colorado Island, Panama, Central America
Male wood duck (Aix sponsa) swimming, Belmar Historic Park, Lakewood, Colorado, United States of America, North America
An adult golden-mantled ground squirrel (Callospermophilus lateralis), Rocky Mountain National Park, Colorado, United States of America, North America
Old silver mines near Silverton, Colorado, United States of America, North America
Female Pronghorn (Antilocapra americana) running, Park County, Colorado, United States of America, North America
Maroon Bells reflected in Maroon Lake with fall color, White River National Forest, Colorado, United States of America, North America
The bend in the Colorado River at Lee's Ferry in Glen Canyon Recreation Area viewed from the plateau at the end of Spencer Trail at Marble Canyon in winter, Arizona, United States of America, North America
Adult Sally Lightfoot crab (Grapsus grapsus) at low tide on Punta Colorado, Isla San Jose, Baja California Sur, Mexico, North America
Detail of waterfall on Sneffels Creek, Yankee Boy Basin, Uncompahgre National Forest, Colorado, United States of America, North America
Aspens in fall colors with mountains and evergreens, near Silver Jack, Uncompahgre National Forest, Colorado, United States of America, North America
Mountain stream through Palmeto Gulch with golden aster (Chrysopsis villosa), Gunnison National Forest, Colorado, United States of America, North America
Bullion King Lake at dawn, Porphyry Basin, San Juan National Forest, Colorado, United States of America, North America
Porphyry Basin and Waterfall, San Juan National Forest, Colorado, United States of America, North America
Mule deer (Odocoileus hemionus) buck in snow, Roxborough State Park, Colorado, United States of America, North America
Paradise Divide, Grand Mesa-Uncompahgre-Gunnison National Forest, Colorado, United States of America, North America
Coyote (Canis latrans) feeding on an elk carcass in Rocky Mountain National Park, Colorado, United States of America, North America
Bull elk (Cervus canadensis) fighting in rut in Rocky Mountain National Park, Colorado, United States of America, North America
Yellow aspens and snow-covered mountains, Uncompahgre National Forest, Colorado, United States of America, North America
Yellow aspen in the fall, Uncompahgre National Forest, Colorado, United States of America, North America
West Rim, Grand Canyon and Colorado River, UNESCO World Heritage Site, Arizona, United States of America, North America
Sky Walk over the Grand Canyon and Colorado River, UNESCO World Heritage Site, Arizona, United States of America, North America
An adult common chuckwalla (Sauromalus ater), at Punta Colorado, Isla San Jose, Baja California Sur, Mexico, North America
Marble Canyon along the Colorado River, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
An adult black spiny-tailed iguana (Ctenosaura similis), on the ground on Barro Colorado Island, Panama, Central America
An adult black vulture (Coragyps atratus), perched in a tree on Barro Colorado Island, Panama, Central America
Yellow aspen and conifers, Colorado, United States of America (U.S.A.), North America
Cow parsnip (Heracleum lanatum) and Alpine sunflower (Hymenoxys grandiflora) with Crested Butte in the distance, Washington Gulch, Gunnison National Forest, Colorado, United States of America, North America
Maroon Bells with fall color, White River National Forest, Colorado, United States of America, North America
Fall sunset near Owl Creek Pass, Uncompahgre National Forest, Colorado, United States of America, North America
Coyote (Canis latrans) feeding on an elk carcass in Rocky Mountain National Park, Colorado, United States of America, North America
The Colorado River from its south shoreline near Phantom Ranch at Grand Canyon Arizona.
Lane through fall aspens, Ophir Pass, Uncompahgre National Forest, Colorado, United States of America, North America
Golden-mantled squirrel (Citellus lateralis), Routt National Forest, Colorado, United States of America, North America
Cliff palace, Colorado River Goose Neck, Dead Horse Point State Park, Utah, USA, North America
The Cliff Palace Indian dwelling, Mesa Verde National Park, UNESCO World Heritage Site, Colorado, United States of America, North America
Yellow aspens and an evergreen in the fall, San Juan National Forest, Colorado, United States of America, North America
Orange aspens in the fall with snow at a lake, Grand Mesa National Forest, Colorado, United States of America, North America
American Pika (Ochotona princeps), Uncompahgre National Forest, Colorado, United States of America, North America
View of the Colorado River from the Glen Canyon Dam Bridge on Highway 89, Arizona, United States of America, North America
Old cliff dwellings and cliff palace in the Mesa Verde National Park, Colorado, USA *** Local Caption ***
Aspen Mountain and old building, Aspen, Colorado, USA
An adult black spiny-tailed iguana (Ctenosaura similis), on the ground on Barro Colorado Island, Panama, Central America
An adult black vulture (Coragyps atratus), perched in a tree on Barro Colorado Island, Panama, Central America
An adult black spiny-tailed iguana (Ctenosaura similis), on the ground on Barro Colorado Island, Panama, Central America
Sneffels Range with fall colors, near Ouray, Colorado, United States of America, North America
Aspens in fall colors with mountains, near Silver Jack, Uncompahgre National Forest, Colorado, United States of America, North America
Cathedral Rock with snow, Garden Of The Gods, Colorado Springs, Colorado, United States of America, North America
White-tailed ptarmigan (Lagopus leucurus) hen among wildflowers, Uncompahgre National Forest, Colorado, United States of America, North America
Porphyry Basin Waterfall, San Juan National Forest, Colorado, United States of America, North America
Field of showy daisy (Erigeron speciosus), Grand Mesa-Uncompahgre-Gunnison National Forest, Colorado, United States of America, North America
Bull elk (Cervus canadensis) fighting in rut in Rocky Mountain National Park, Colorado, United States of America, North America
American Avocet (Recurvirostra americana), Belmar Historic Park, Lakewood, Colorado, United States of America, North America
View over the canyonlands and the Colorado River from the Dead Horse State Park, Utah, United States of America, North America
Beaver (Castor canadensis) swimming, Colorado State Forest State Park, Colorado, United States of America, North America
Maroon Bells reflected in Maroon Lake with fall color, White River National Forest, Colorado, United States of America, North America
Cow moose (Alces alces), Roosevelt National Forest, Colorado, United States of America, North America
Yellow and orange hillside of aspen in the fall, Uncompahgre National Forest, Colorado, United States of America, North America
West Rim, Grand Canyon and Colorado River, UNESCO World Heritage Site, Arizona, United States of America, North America
Horseshoe Bend, Glen Canyon, Colorado River, Arizona, United States of America, North America
Mountain bluebird (Sialia currucoides) male feeding female, near Castlewood Canyon State Park, Colorado, United States of America, North America
Juvenile American robin (Turdus migratorius), Gunnison County, Colorado, United States of America, North America
Aspen grove in early fall, White River National Forest, Colorado, United States of America, North America
Mountain goat (Oreamnos americanus), Mount Evans, Colorado, United States of America, North America
Sunrise near Punta Colorado, San Jose Island, Baja California Sur, Mexico, North America
Aspen trunks in the fall, White River National Forest, Colorado, United States of America, North America
American pipit (Anthus rubescens), San Juan National Forest, Colorado, United States of America, North America
Mount Sneffels at sunrise in the fall, Uncompahgre National Forest, Colorado, United States of America, North America
Sky Walk over the Grand Canyon and Colorado River, UNESCO World Heritage Site, Arizona, United States of America, North America
Shooting the rapids in a raft on the Colorado River, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America