USA, Alaska, Lake Clark National Park. Grizzly bear sow resting with cubs.

USA, Alaska, Lake Clark National Park. Grizzly bear cub looks at its standing mother.

USA, Alaska, Lake Clark National Park. Grizzly bear cubs playing.

USA, Alaska, Lake Clark National Park. Grizzly bear cubs relaxing with mother.

Female Brown bear and cubs, Silver Salmon Creek, Lake Clark National Park, Alaska.

Coastal brown bears hunting salmon, Redoubt Bay, Alaska, USA

Brown bear fishing for salmon, Silver Salmon Creek, Lake Clark National Park, Alaska.

Brown bears fighting over a salmon, Silver Salmon Creek, Lake Clark National Park, Alaska.

Brown Bear (Ursus arctos) with rainbow above forest, Suomussalmi, Karelia, Finland, Europe

Brown Bear (Ursus arctos) with three cubs, Suomussalmi, Karelia, Finland, Europe

Brown bears fighting in Katmai National Park, Alaska

Brown bears fighting in Katmai National Park, Alaska

USA, Katmai National Park, Brook Falls, Alaska. A Brown bear with a sockeye salmon in its mouth as another leaps over Brook Falls to escape to its spawning grounds.

USA, Katmai National Park, Brook Falls, Alaska. A Brown bear pounces on a sockeye salmon as it prepares to leap over Brook Falls on its way to spawning grounds.

Brown bear (Ursus arctos alascensis), Brooks Lake, Katmai National Park and Preserve, alaska peninsula, Alaska, USA

Brown bear (Ursus arctos alascensis), Brooks Lake, Katmai National Park and Preserve, alaska peninsula, Alaska, USA

United States, Utah, Grizzly bear (Ursus arctos horribilis)

Canada, Nunavut Territory, Setting midnight sun lights Polar Bear (Ursus maritimus) walking along rocky shoreline by Hudson Bay

Young Brown Bear (Ursus arctos) standing amidst unidentified shrubs in a boreal forest, Finland, Oulu, Vartsius

Male Brown Bear (Ursus arctos) is walking through a snow covered boreal forest, Finland, Oulu, Vartsius

USA, Alaska, Katmai National Park, Coastal Brown Bear (Ursus arctos) swims across salmon spawning stream by Kuliak Bay.

USA, Alaska, Katmai National Park, Coastal Brown Bear (Ursus arctos) catches Red Salmon (Oncorhynchus nerka) in spawning stream along Kaflia Bay.

USA, Alaska, Katmai National Park, Grizzly Bear Cubs (Ursus arctos) walking along Kukak Bay before sunrise on late summer morning

USA, Alaska, Katmai National Park, Grizzly Bear (Ursus arctos), Kukak Bay

United States, Alaska, Lake Clark National Park. Girzzly bear cub with wet fur.

USA, Alaska, Katmai National Park, Kukak Bay, Brown Bears (Ursus arctos) sparring in meadow at sunrise on late summer morning

USA, Alaska, Katmai National Park, Kukak Bay, Brown Bear (Ursus arctos) fishing for spawning salmon in small stream in late summer

USA, Alaska, Katmai National Park, Kukak Bay, Brown Bear (Ursus arctos) chases spawning salmon in small stream at dusk on late summer evening

USA, Alaska, Katmai National Park, Brown Bears (Ursus arctos) sparring in meadow along Hallo Bay

USA, Alaska, Katmai National Park, Brown bear (Ursus arctos) lies on back in meadow along Hallo Bay

Grizzly Bear (Ursus arctos horribilis) standing in vegetation, Alaska, Denali National Park and Preserve, United States

Adult Brown Bear (Ursus arctos) walking between Cottongrass (Eriophorum angustifolium) in a taiga forest, Kuhmo, Vartius, Kainuu, Finland

USA, Alaska, Lake Clark National Park. Grizzly bear cubs playing.

USA, Alaska, Lake Clark National Park. Grizzly bear cubs relaxing with mother.

USA, Alaska, Lake Clark National Park. Grizzly bear sow resting with cubs.

USA, Alaska, Lake Clark National Park. Grizzly bear sow close-up.

USA, Alaska, Lake Clark National Park. Grizzly bear cubs resting.

USA, Alaska, Lake Clark National Park. Grizzly bear sow searching for clams at sunrise.

USA, Alaska, Lake Clark National Park. Grizzly bear sow with cub searching for clams in mud.

Eurasian brown bear (Ursus arctos arctos) National Park Bavarian Forest, enclosure, Germany