Mammal photos

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.
Species: Elk, Cervus canadensis
Location: Mammoth Hot Springs, Yellowstone National Park, Wyoming
Image ID: 19693  

Bull elk spar to establish harems of females, Gibbon Meadow.
Species: Elk, Cervus canadensis
Location: Gibbon Meadows, Yellowstone National Park, Wyoming
Image ID: 13151  

Alaskan brown bear catching a jumping salmon, Brooks Falls.
Species: Brown bear, Ursus arctos
Location: Brooks River, Katmai National Park, Alaska
Image ID: 17031  

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.
Species: Brown bear, Ursus arctos
Location: Brooks River, Katmai National Park, Alaska
Image ID: 17039  

Full grown, mature male coastal brown bear boar (grizzly bear) in sedge grass meadows.
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska
Image ID: 19134  

Mule deer in tall grass, fall, autumn.
Species: Mule deer, Odocoileus hemionus
Location: Yellowstone National Park, Wyoming
Image ID: 19577  

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.
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska
Image ID: 19135  

Coyote, pausing to look for prey as it passes through Bosque del Apache National Wildlife Refuge.
Species: Coyote, Canis latrans
Location: Bosque del Apache National Wildlife Refuge, Socorro, New Mexico
Image ID: 21803  

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.
Species: American black bear, Ursus americanus
Location: Orr, Minnesota
Image ID: 18744  

Adult female moose in deep meadow grass near Christian Creek.
Species: Moose, Alces alces
Location: Christian Creek, Grand Teton National Park, Wyoming
Image ID: 13039  

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.
Species: American bison, Bison bison
Location: Yellowstone National Park, Wyoming
Image ID: 13120  

Mountain lion, Sierra Nevada foothills, Mariposa, California.
Species: Mountain lion, Puma concolor
Image ID: 15791  

Two mature brown bears fight to establish hierarchy and fishing rights.
Species: Brown bear, Ursus arctos
Location: Brooks River, Katmai National Park, Alaska
Image ID: 17036  

Brown bear waits for salmon at Brooks Falls. Blurring of the water is caused by a long shutter speed. Brooks River.
Species: Brown bear, Ursus arctos
Location: Brooks River, Katmai National Park, Alaska
Image ID: 17047  

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.
Species: American black bear, Ursus americanus
Location: Orr, Minnesota
Image ID: 18741  

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.
Species: American black bear, Ursus americanus
Location: Orr, Minnesota
Image ID: 18743  

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.
Species: American black bear, Ursus americanus
Location: Orr, Minnesota
Image ID: 18745  

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.
Species: American black bear, Ursus americanus
Location: Orr, Minnesota
Image ID: 18746  

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.
Species: American black bear, Ursus americanus
Location: Orr, Minnesota
Image ID: 18747  

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.
Species: American black bear, Ursus americanus
Location: Orr, Minnesota
Image ID: 18748  

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.
Species: American black bear, Ursus americanus
Location: Orr, Minnesota
Image ID: 18749  

Brown bear walks on tide flats. Grizzly bear.
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska
Image ID: 19136  

Juvenile female coastal brown bear (grizzly bear) grazes on sedge grass.
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska
Image ID: 19137  

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.
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska
Image ID: 19138  

A brown bear mother (sow) stands in tall sedge grass to look for other approaching bears that may be a threat to her cubs.
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska
Image ID: 19139  

Coastal brown bear forages for razor clams in sand flats at extreme low tide. Grizzly bear.
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska
Image ID: 19140  

Juvenile female brown bear forages for razor clams in sand flats at extreme low tide. Grizzly bear.
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska
Image ID: 19141  

Coastal brown bear on sand flats at low tide.
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska
Image ID: 19142  

Young brown bear stands in tall sedge grass to get a better view of other approaching bears.
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska
Image ID: 19143  

Coastal brown bear walking on sand beach.
Species: Brown bear, Ursus arctos
Location: Lake Clark National Park, Alaska
Image ID: 19144