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
An adult male desert spiny lizard (Sceloporus magister), under a ledge in Grand Canyon National Park, Arizona, United States of America, North America

Adult Brandt's cormorant (Urile penicillatus), at the surface in Monterey Bay Marine Sanctuary, Monterey, California, United States of America, North America

Adult bull killer whales (Orcinus orca), surfacing near the Cleveland Peninsula, Southeast Alaska, United States of America, North America

An adult Wyoming ground squirrel (Urocitellus elegans), in Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Young humpback whale (Megaptera novaeangliae), breaching at sunset in Peril Strait, Southeast Alaska, 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

Common snipe (Gallinago gallinago), Arapaho National Wildlife Refuge, Colorado, United States of America, North America

Uinta Ground Squirrel (Urocitellus armatus) adult and young, Yellowstone National Park, Wyoming, United States of America, North America

American bison (Bison bison), covered in snow, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Snow goose (Chen caerulescens) flock in flight, Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

A young brown bear (Ursus arctos) fishing in the water at Lake Clark National Park and Preserve, Alaska, United States of America, North America

Adult California kingsnake (Lampropeltis californiae), Thong Chul, Tucson, Arizona, United States of America, North America

An adult female acorn woodpecker (Melanerpes formicivorous), Madera Canyon, southern Arizona, Arizona, United States of America, North America

Uinta Ground Squirrel (Urocitellus armatus), Yellowstone National Park, Wyoming, United States of America, North America

An adult tufted puffin (Fratercula cirrhata) roosting on a cliff in Kenai Fjords National Park, Alaska, United States of America, North America

California ground squirrel (Otospermophilus beecheyi), on granite rock, Yosemite Village, Yosemite National Park, California, United States of America, North America

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

American red squirrel (Tamiasciurus hudsonicus) on tree, Tolsona, Alaska, United States of America, North America

Flocks of seabirds take flight along the shores of Kiska Island, Aleutians, Alaska, United States of America, North America

Adult North American porcupine (Erethizon dorsatum), climbing a tree, Glacier Bay National Park, Alaska, United States of America, North America

An adult female Costa's hummingbird (Calypte costae) feeding in Madera Canyon, southern Arizona, Arizona, United States of America, North America

An adult male desert spiny lizard (Sceloporus magister), under a ledge in Grand Canyon National Park, Arizona, United States of America, North America

Transient killer whales (Orcinus orca), surfacing in Monterey Bay Marine Sanctuary, Monterey, California, United States of America, North America

Transient male killer whales (Orcinus orca), surfacing in Monterey Bay Marine Sanctuary, Monterey, California, United States of America, North America

California sea lions (Zalophus californianus), hauled out in Monterey Bay National Marine Sanctuary, California, United States of America, North America

California sea lion (Zalophus californianus), hauled out in Monterey Bay National Marine Sanctuary, California, United States of America, North America

An adult female dusky grouse (Dendragapus obscurus), displaying in Yellowstone National Park, Wyoming, United States of America, North America

Bighorn sheep (Ovis canadensis) ram on rocky slope, Colorado, United States of America, North America

Mule deer (Odocoileus hemionus) buck in snow, Roxborough State Park, Colorado, United States of America, North America

Female common redpoll (Carduelis flammea), Archangel Pass, Alaska, United States of America, North America

Brown Bear (Ursus arctos horribilis) in Moraine Creek, Katmai National Park and Preserve, Alaska, United States of America, North America

Bull Elk (Cervus canadensis) in snow, Yellowstone National Park, Wyoming, United States of America, North America

Bighorn Sheep (Ovis canadensis) ram in the snow, Yellowstone National Park, Wyoming, United States of America, North America

Vertical of bull moose (Alces alces) in front of Teton Range, Grand Teton National Park, Wyoming, United States of America, North America

Bison (Bison bison), Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Yellow-eyed junco (Junco phaeonotus), Chiricahuas, Coronado National Forest, Arizona, United States of America, North America

Hoary marmot (Marmota caligata), Glacier National Park, Montana, United States of America, North America

Greater roadrunner (Geococcyx californianus), Bosque del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Common chuckwalla (Sauromalus ater), Leadfield in Titus Canyon in Death Valley National Park, California, United States of America, North America

Female mallard (Anas platyrhynchos) swimming, Sweetwater Wetlands, Tucson, Arizona, United States of America, North America

Peacock (Pavo Cristatus), Sequim, Olympic Peninsula, Washington, United States of America, North America

A young brown bear (Ursus arctos) along the shoreline at Lake Clark National Park and Preserve, Alaska, United States of America, North America

An adult humpback whale (Megaptera novaeangliae) head-lunging in Kenai Fjords National Park, Alaska, United States of America, North America

An adult red-spotted toad (Anaxyrus punctatus), basking in the sun in Grand Canyon National Park, Arizona, United States of America, North America

An adult ornate tree lizard (Urosaurus ornatu), basking in the sun in Grand Canyon National Park, Arizona, United States of America, North America

An adult female bighorn sheep (Ovis canadensis nelsoni), in a cave for shade in Grand Canyon National Park, Arizona, United States of America, North America

An adult desert collared lizard (Crotaphytus bicinctores), basking in Grand Canyon National Park, Arizona, United States of America, North America

Frozen bison (Bison bison), running across snow, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

American bison covered in snow, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

Male chukar (Alectoris chukar), Antelope Island State Park, Utah, United States of America, North America

Gilded Flicker (Colaptes chrysoides) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America

Bison (Bison bison) in snow, Yellowstone National Park, Wyoming, United States of America, North America

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

Mule deer (Odocoileus hemionus) buck in velvet, Glacier National Park, Montana, United States of America, North America

Eastern kingbird (Tyrannus tyrannus), Pawnee National Grassland, Colorado, United States of America, North America

Grizzly bear (Ursus arctos horribilis), Glacier National Park, Montana, United States of America, North America

A Mexican jay (Aphelocoma wollweberi), in a tree in the Chiricahua National Monument, Arizona, Arizona, United States of America, North America

American red squirrel (Tamiasciurus hudsonicus) on tree, Tolsona, Alaska, United States of America, North America

American red squirrel (Tamiasciurus hudsonicus) on tree, Tolsona, Alaska, United States of America, North America

Transient killer whale (Orcinus orca) breaching in the Monterey Bay National Marine Sanctuary, California, United States of America, North America

An adult black-footed albatross (Phoebastria nigripes) in flight at sea, Monterey Bay, California, United States of America, North America

An adult female Costa's hummingbird (Calypte costae) feeding in Madera Canyon, southern Arizona, Arizona, United States of America, North America

An adult humpback whale (Megaptera novaeangliae), surface lunge feeding in Monterey Bay Marine Sanctuary, California, United States of America, North America

An adult humpback whale (Megaptera novaeangliae), flukes up dive in Monterey Bay Marine Sanctuary, California, United States of America, North America

Coyote (Canis latrans), Rocky Mountain National Park, Colorado, United States of America, North America

Black bear (Ursus americanus) spring cub in captivity, Sandstone, Minnesota, United States of America, North America

Golden-mantled squirrel (Citellus lateralis), Rocky Mountain National Park, Colorado, United States of America, North America

Bull elk (Cervus canadensis), Rocky Mountain National Park, Colorado, United States of America, North America

Western grebe (Aechmophorus occidentalis) courtship, Bear River Migratory Bird Refuge, Utah, United States of America

Brown Bear (Ursus arctos horribilis) sow and cub, Katmai National Park and Preserve, Alaska, United States of America, North America

Sandhill Crane (Grus canadensis) just about to land, Bernardo Wildlife Area, Ladd S. Gordon Wildlife Complex, New Mexico, United States of America, North America

Greater Roadrunner (Geococcyx californianus), Bosque Del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Desert collared lizard (Crotaphytus bicinctores), Mosaic Canyon Trail, Death Valley National Park, California, United States of America, North America

Double-Crested Cormorant (Phalacrocorax auritus) in flight with nesting material, Denver City Park, Denver, Colorado, United States of America, North America

Oregon Junco (Junco hyemalis oreganus), a Dark-Eyed Junco (Junco hyemalis), Roxborough State Park, Colorado, United States of America, North America

Snowy egret (Egretta thula) wading, San Jacinto Wildlife Area, California, United States of America, North America

Male pyrrhuloxia (Cardinalis sinuatus), The Pond, Amado, Arizona, United States of America, North America

Hoary marmot (Marmota caligata), Glacier National Park, Montana, United States of America, North America

Bison (Bison bison) in snow with geyser, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

An adult male acorn woodpecker (Melanerpes formicivorous), Madera Canyon, southern Arizona, Arizona, United States of America, North America

An adult female Costa's hummingbird (Calypte costae) feeding in Madera Canyon, southern Arizona, Arizona, United States of America, North America

An adult male broad-billed hummingbird (Cynanthus latirostris magicus), Madera Canyon, southern Arizona, Arizona, United States of America, North America

An adult male broad-billed hummingbird (Cynanthus latirostris magicus), Madera Canyon, southern Arizona, Arizona, United States of America, North America

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

Captive muskox (Ovibos moschatus), Alaska Wildlife Conservation Center, Girlwood, Alaska, United States of America, North America

Adult humpback whale (Megaptera novaeangliae) breaching in Monterey Bay National Marine Sanctuary, California, United States of America, North America

Mountain lion (cougar) (Felis concolor), in captivity Sandstone, Minnesota, United States of America, North America

Silhouetted Sandhill Crane (Grus canadensis) in flight at sunset, Bernardo Wildlife Area, Ladd S. Gordon Wildlife Complex, New Mexico, United States of America, North America

Trumpeter swan in river, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America