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

Columbian ground squirrel (Citellus columbianus) feeding, Glacier National Park, Montana, United States of America, North America

San Juan Mountains from Black Bear Pass Road, San Juan National Forest, Colorado, 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

Western pasqueflower (Anemone occidentalis), Glacier National Park, Montana, United States of America, North America

Mountain bluebird (Sialia currucoides) with a grub, Yellowstone National Park, Wyoming, United States of America, North America

Sulfur paintbrush (Castilleja sulphurea), Waterton Lakes National Park, Alberta, Canada, North America

Western false Solomon's seal (false Solomon's seal) (Solomon's plume) (treacleberry) (false spikenard) (Maianthemum racemosum), Glacier National Park, Montana, United States of America, North America

American robin (Turdus migratorius), Glacier National Park, Montana, 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

Grizzly bear (Ursus arctos horribilis), 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

Western kingbird (Tyrannus verticalis), Pawnee National Grassland, Colorado, United States of America, North America

Falls on Nigel Creek, Banff National Park, UNESCO World Heritage Site, Alberta, Canada, North America

Thirteen-lined ground Squirrel (Citellus tridecemlineatus) feeding, Pawnee National Grassland, Colorado, 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

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

White-tailed ptarmigan (Lagopus leucurus) chick, San Juan National Forest, Colorado, United States of America, North America

Tan sandstone at first light, Coyote Buttes Wilderness, Vermilion Cliffs National Monument, Arizona, 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

Two cheetah (Acinonyx jubatus) cubs playing, Ngorongoro Conservation Area, Serengeti, Tanzania, East Africa, Africa

Black Bear (Ursus americanus) cub of the year or spring cub, Yellowstone National Park, Wyoming, United States of America, North America

Swift fox (Vulpes velox) kit, Pawnee National Grassland, Colorado, United States of America, North America

Swift fox (Vulpes velox) kits playing, Pawnee National Grassland, Colorado, United States of America, North America

Leopard (Panthera pardus) with Cape porcupine quills stuck in it, Kruger National Park, South Africa, Africa

African daisy (Gousblom) (Arctotis hirsuta), white African daisy, Cape rain-daisy (Witbotterblom) (Dimorphotheca pluvialis), South Africa, Africa

African white-backed vulture (Gyps africanus) fighting at a carcass, Kruger National Park, South Africa, Africa

Black bear (Ursus americanus), outside Glacier National Park, Montana, United States of America, North America

Chapman•À?s zebra (plains zebra) (Equus burchelli antiquorum), Hluhluwe Game Reserve, South Africa, Africa

Male defassa waterbuck (Kobus ellipsiprymnus defassa), Masai Mara National Reserve, Kenya, East Africa, Africa

Spotted hyena (spotted hyaena) (Crocuta crocuta), Masai Mara National Reserve, Kenya, East Africa, Africa

White-tailed Ptarmigan (Lagopus leucurus) among wildflowers, Mineral Basin, San Juan National Forest, Colorado, United States of America, North America

Infant Chacma baboon (Papio ursinus) riding on its mother's back, Imfolozi Game Reserve, South Africa, Africa

Common Waterbuck (Ellipsen Waterbuck) (Kobus ellipsiprymnus ellipsiprymnus) buck, Kruger National Park, South Africa

Male Audubon's Yellow-Rumped Warbler (Dendroica coronata auduboni), Yellowstone National Park, Wyoming, United States of America, North America

RuppellÕs griffon vulture (Gyps rueppellii) atop a Cape buffalo (African buffalo) (Syncerus caffer) carcass, Masai Mara National Reserve, Kenya, East Africa, Africa

Young beaver (Castor canadensis) swimming, Denali National Park and Preserve, Alaska, United States of America, North America

Chacma baboon (Papio ursinus) with its cheeks full of food, Hluhluwe Game Reserve, South Africa, Africa

Lion (Panthera leo), Kgalagadi Transfrontier Park, encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Bateleur (Terathopius ecaudatus), Kgalagadi Transfrontier Park, encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Cheetah (Acinonyx jubatus), Kgalagadi Transfrontier Park, encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Crowned plover (crowned lapwing) (Vanellus coronatus), Serengeti National Park, Tanzania, East Africa, Africa

Lappet-faced vulture (Torgos tracheliotus) pair, Serengeti National Park, Tanzania, East Africa, Africa

Spotted Hyena or Spotted Hyaena (Crocuta crocuta) at a Cape Buffalo kill, Ngorongoro Crater, Tanzania

Male Impala (Aepyceros melampus) with a Red-Billed Oxpecker (Buphagus erythrorhynchus), Kruger National Park, South Africa, Africa

Grizzly bear (Ursus arctos horribilis) sow and two cubs of the year, Yellowstone National Park, Wyoming, United States of America, North America

Black-backed jackal (silver-backed jackal) (Canis mesomelas) drinking, Kgalagadi Transfrontier Park, encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

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

Cheetah (Acinonyx jubatus) siblings, Kgalagadi Transfrontier Park, encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Captive fisher (Martes pennanti) in a tree in the snow, near Bozeman, Montana, United States of America, North America

Black-tailed prairie dog (blacktail prairie dog) (Cynomys ludovicianus), Custer State Park, South Dakota, United States of America, North America

Eastern cottontail (Sylvilagus floridanus), Custer State Park, South Dakota, United States of America, North America

Aspen trunks among yellow leaves, Uncompahgre National Forest, Colorado, United States of America, North America

Red leaves on a bigtooth maple (Acer grandidentatum) surround a Ponderosa pine trunk in the fall, Zion National Park, Utah, United States of America, North America

Sandstone hill with swirly layers, White Pocket, Vermillion Cliffs National Monument, Arizona, United States of America, North America

Pronghorn (Antilocapra americana) buck, Custer State Park, South Dakota, United States of America, North America

Young mule deer (Odocoileus hemionus), Custer State Park, South Dakota, United States of America, North America

Least chipmunk (Neotamias minimus) eating, Custer State Park, South Dakota, United States of America, North America

Three black-tailed prairie dog (blacktail prairie dog) (Cynomys ludovicianus), Custer State Park, South Dakota, United States of America, North America

Coyote (Canis latrans) with a NorthernpPintail (Anas acuta) in its mouth, Bosque Del Apache National Wildlife Refuge, New Mexico, United States of America, North America

Fern Falls, Coeur d'Alene National Forest, Idaho Panhandle National Forests, Idaho, United States of America, North America

Mountain goat (Oreamnos americanus) nanny and kid, Shoshone National Forest, Wyoming, United States of America, North America

Two hippopotamus (Hippopotamus amphibius) sparring, Serengeti National Park, Tanzania, East Africa, Africa

Two cheetah (Acinonyx jubatus) cubs at an African hare kill, Serengeti National Park, Tanzania, East Africa, Africa

Several yellow-billed oxpecker (Buphagus africanus) on a Masai giraffe (Giraffa camelopardalis tippelskirchi), Serengeti National Park, Tanzania, East Africa, Africa

Red-billed oxpecker (Buphagus erythrorhynchus) on a white rhinoceros (Ceratotherium simum), Kruger National Park, South Africa, Africa

Springbok (Antidorcas marsupialis) herd, Kgalagadi Transfrontier Park, encompassing the former Kalahari Gemsbok National Park, South Africa, Africa

Colorado chipmunk (Eutamias quadrivittatus) eating, San Juan National Forest, Colorado, United States of America, North America

Sharp-tailed grouse (Tympanuchus phasianellus, previously Tetrao phasianellus), Custer State Park, South Dakota, United States of America, North America

Waterfall on Clear Creek, San Juan National Forest, Colorado, United States of America, North America

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

Common raven (Corvus corax) pair, Yellowstone National Park, Wyoming, United States of America, North America