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Male elk bugling during the fall rut. Large male elk are known as bulls. Male elk have large antlers which are shed each year. Male elk engage in competitive mating behaviors during the rut, including posturing, antler wrestling and bugling, a loud series of screams which is intended to establish dominance over other males and attract females.
Image ID: 19693
Species: Elk, Cervus canadensis
Location: Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA | Bull elk spar to establish harems of females, Gibbon Meadow.
Image ID: 13151
Species: Elk, Cervus canadensis
Location: Gibbon Meadows, Yellowstone National Park, Wyoming, USA | Alaskan brown bear catching a jumping salmon, Brooks Falls.
Image ID: 17031
Species: Brown bear, Ursus arctos
Location: Brooks River, Katmai National Park, Alaska, USA |
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A large, old brown bear (grizzly bear) wades across Brooks River. Coastal and near-coastal brown bears in Alaska can live to 25 years of age, weigh up to 1400 lbs and stand over 9 feet tall.
Image ID: 17039
Species: Brown bear, Ursus arctos
Location: Brooks River, Katmai National Park, Alaska, USA | Full grown, mature male coastal brown bear boar (grizzly bear) in sedge grass meadows.
Image ID: 19134
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA | Mule deer in tall grass, fall, autumn.
Image ID: 19577
Species: Mule deer, Odocoileus hemionus
Location: Yellowstone National Park, Wyoming, USA |
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Portrait of a young brown bear, pausing while grazing in tall sedge grass. Brown bears can consume 30 lbs of sedge grass daily, waiting weeks until spawning salmon fill the rivers.
Image ID: 19135
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA | Black bear walking in a grassy meadow. Black bears can live 25 years or more, and range in color from deepest black to chocolate and cinnamon brown. Adult males typically weigh up to 600 pounds. Adult females weight up to 400 pounds and reach sexual maturity at 3 or 4 years of age. Adults stand about 3' tall at the shoulder.
Image ID: 18744
Species: American black bear, Ursus americanus
Location: Orr, Minnesota, USA | Adult female moose in deep meadow grass near Christian Creek.
Image ID: 13039
Species: Moose, Alces alces
Location: Christian Creek, Grand Teton National Park, Wyoming, USA |
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The bisons massive head is its most characteristic feature. Its forehead bulges because of its convex-shaped frontal bone. Its shoulder hump, dwindling bowlike to the haunches, is supported by unusually long spinal vertebrae. Over powerful neck and shoulder muscles grows a great shaggy coat of curly brown fur, and over the head, like an immense hood, grows a shock of black hair. Its forequarters are higher and much heavier than its haunches. A mature bull stands about 6 1/2 feet (2 meters) at the shoulder and weighs more than 2,000 pounds (900 kilograms). The bisons horns are short and black. In the male they are thick at the base and taper abruptly to sharp points as they curve outward and upward; the females horns are more slender.
Image ID: 13120
Species: American bison, Bison bison
Location: Yellowstone National Park, Wyoming, USA | Mountain lion, Sierra Nevada foothills, Mariposa, California.
Image ID: 15791
Species: Mountain lion, Puma concolor | Coyote, Sierra Nevada foothills, Mariposa, California.
Image ID: 15879
Species: Coyote, Canis latrans |
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Two mature brown bears fight to establish hierarchy and fishing rights.
Image ID: 17036
Species: Brown bear, Ursus arctos
Location: Brooks River, Katmai National Park, Alaska, USA | Brown bear waits for salmon at Brooks Falls. Blurring of the water is caused by a long shutter speed. Brooks River.
Image ID: 17047
Species: Brown bear, Ursus arctos
Location: Brooks River, Katmai National Park, Alaska, USA | Black bear walking in a grassy meadow. Black bears can live 25 years or more, and range in color from deepest black to chocolate and cinnamon brown. Adult males typically weigh up to 600 pounds. Adult females weight up to 400 pounds and reach sexual maturity at 3 or 4 years of age. Adults stand about 3' tall at the shoulder.
Image ID: 18741
Species: American black bear, Ursus americanus
Location: Orr, Minnesota, USA |
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Black bear walking in a grassy meadow. Black bears can live 25 years or more, and range in color from deepest black to chocolate and cinnamon brown. Adult males typically weigh up to 600 pounds. Adult females weight up to 400 pounds and reach sexual maturity at 3 or 4 years of age. Adults stand about 3' tall at the shoulder.
Image ID: 18743
Species: American black bear, Ursus americanus
Location: Orr, Minnesota, USA | Black bear in a tree. Black bears are expert tree climbers and will ascend trees if they sense danger or the approach of larger bears, to seek a place to rest, or to get a view of their surroundings.
Image ID: 18745
Species: American black bear, Ursus americanus
Location: Orr, Minnesota, USA | Black bear cub in a tree. Mother bears will often send their cubs up into the safety of a tree if larger bears (who might seek to injure the cubs) are nearby. Black bears have sharp claws and, in spite of their size, are expert tree climbers.
Image ID: 18746
Species: American black bear, Ursus americanus
Location: Orr, Minnesota, USA |
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Black bear in a tree. Black bears are expert tree climbers and will ascend trees if they sense danger or the approach of larger bears, to seek a place to rest, or to get a view of their surroundings.
Image ID: 18747
Species: American black bear, Ursus americanus
Location: Orr, Minnesota, USA | Black bear walking in a grassy meadow. Black bears can live 25 years or more, and range in color from deepest black to chocolate and cinnamon brown. Adult males typically weigh up to 600 pounds. Adult females weight up to 400 pounds and reach sexual maturity at 3 or 4 years of age. Adults stand about 3' tall at the shoulder.
Image ID: 18748
Species: American black bear, Ursus americanus
Location: Orr, Minnesota, USA | Black bear walking in a grassy meadow. Black bears can live 25 years or more, and range in color from deepest black to chocolate and cinnamon brown. Adult males typically weigh up to 600 pounds. Adult females weight up to 400 pounds and reach sexual maturity at 3 or 4 years of age. Adults stand about 3' tall at the shoulder.
Image ID: 18749
Species: American black bear, Ursus americanus
Location: Orr, Minnesota, USA |
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Brown bear walks on tide flats. Grizzly bear.
Image ID: 19136
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA | Juvenile female coastal brown bear (grizzly bear) grazes on sedge grass.
Image ID: 19137
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA | Coastal brown bear in meadow. The tall sedge grasses in this coastal meadow are a food source for brown bears, who may eat 30 lbs of it each day during summer while waiting for their preferred food, salmon, to arrive in the nearby rivers.
Image ID: 19138
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA |
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A brown bear mother (sow) stands in tall sedge grass to look for other approaching bears that may be a threat to her cubs.
Image ID: 19139
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA | Coastal brown bear forages for razor clams in sand flats at extreme low tide. Grizzly bear.
Image ID: 19140
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA | Juvenile female brown bear forages for razor clams in sand flats at extreme low tide. Grizzly bear.
Image ID: 19141
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA |
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Coastal brown bear on sand flats at low tide.
Image ID: 19142
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA | Young brown bear stands in tall sedge grass to get a better view of other approaching bears.
Image ID: 19143
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA | Coastal brown bear walking on sand beach.
Image ID: 19144
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska, USA |
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