Alaskan brown bear catching a jumping salmon, Brooks Falls, Ursus arctos, Brooks River, Katmai National Park

Brown Bear Catching Salmon, Brooks River

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, Ursus arctos, Katmai National Park

Brown Bear, Brooks River

Full grown, mature male coastal brown bear boar (grizzly bear) in sedge grass meadows, Ursus arctos, Lake Clark National Park, Alaska

Mature male coastal brown bear boar (grizzly bear) in sedge grass meadows. Lake Clark National Park, Alaska. Ursus arctos.

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, Ursus arctos, Lake Clark National Park, Alaska

Young coastal brown bear, pausing while grazing in tall sedge grass, Lake Clark National Park, Alaska. Ursus arctos.

Two mature brown bears fight to establish hierarchy and fishing rights, Ursus arctos, Brooks River, Katmai National Park, Alaska

Brown Bears Fighting, Brooks River

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

Brown Bear, Brooks River

Brown bear walks on tide flats.  Grizzly bear, Ursus arctos, Lake Clark National Park, Alaska

Brown Bear, Lake Clark National Park

Juvenile female coastal brown bear (grizzly bear) grazes on sedge grass, Ursus arctos, Lake Clark National Park, Alaska

Brown Bear, Lake Clark National Park

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

Brown Bear, Lake Clark National Park

Coastal brown bear forages for razor clams in sand flats at extreme low tide.  Grizzly bear, Ursus arctos, Lake Clark National Park, Alaska

Brown Bear Clamming, Lake Clark National Park

Brown bears fighting or sparring.  These are likely young but sexually mature males that are simply mock fighting for practice, Ursus arctos, Lake Clark National Park, Alaska

Brown Bear, Lake Clark National Park

Coastal brown bear on sand flats at low tide, Ursus arctos, Lake Clark National Park, Alaska

Brown Bear, Lake Clark National Park

Grizzly bear, autumn, fall, brown grasses, Ursus arctos horribilis, Lamar Valley, Yellowstone National Park, Wyoming

Grizzly Bear, Lamar Valley

Brown bear female sow with spring cubs.  These three cubs were born earlier in the spring and will remain with their mother for almost two years, relying on her completely for their survival, Ursus arctos, Lake Clark National Park, Alaska

Brown Bear, Lake Clark National Park

Alaskan brown bear catching a jumping salmon, Brooks Falls, Ursus arctos, Brooks River, Katmai National Park

Brown Bear Catching Salmon, Brooks River

A brown bear eats a salmon it has caught in the Brooks River, Ursus arctos, Katmai National Park, Alaska

Brown Bear Eating Salmon, Brooks River

Brown bear spring cub, just a few months old, Ursus arctos, Brooks River, Katmai National Park, Alaska

Brown Bear Cub, Brooks River

Brown bear walks through the marshes that skirt the Brooks River, Ursus arctos, Katmai National Park, Alaska

Brown Bear, Brooks River

Mature male brown bear boat walks in tall sedge grass, Ursus arctos, Lake Clark National Park, Alaska

Brown Bear, Lake Clark National Park

Mother and cub coastal brown bear in sedge grass meadow, Johnson River, Ursus arctos, Lake Clark National Park, Alaska

Brown Bear, Johnson River

Coastal brown bear forages for razor clams on mud flats at extreme low tide, Ursus arctos, Lake Clark National Park, Alaska

Brown Bear Clamming, Lake Clark National Park

Brown bear (grizzly bear), Ursus arctos, Brooks River, Katmai National Park, Alaska

Brown Bear, Brooks River

Alaskan brown bear catching a jumping salmon, Brooks Falls, Ursus arctos, Brooks River, Katmai National Park

Brown Bear Catching Salmon, Brooks River

A brown bear eats a salmon it has caught in the Brooks River, Ursus arctos, Katmai National Park, Alaska

Brown Bear Eating Salmon, Brooks River

Alaskan brown bear catching a jumping salmon, Brooks Falls, Ursus arctos, Brooks River, Katmai National Park

Brown Bear Catching Salmon, Brooks River