A brown bear boar sniffs the air near the shore in Kukak Bay, Katmai National Park & Preserve, Alaska.

A battle-scarred brown bear boar grazes in tall grasses in Katmai National Park & Preserve, Alaska.

A large, battle-scarred brown bear boar crosses a stream in Kukak Bay, Katmai National Park & Preserve, Alaska.

A sea otter swims away on its back in Kukak Bay, Katmai National Park & Preserve, Alaska.

A brown bear sow hauls away a coho (silver) salmon in Lake Clark National Park & Preserve, Alaska.

A young brown bear boar chases a young red fox on a beach in Kukak Bay, Katmai National Park & Preserve, Alaska.

A brown bear sow stands upright as she looks for salmon in Lake Clark National Park & Preserve, Alaska.

A brown bear sow and her cubs wander across the mudflats at low tide in search of clams, Lake Clark National Park & Preserve, Alaska.

A brown bear sow and her cubs wander across the mudflats at low tide in search of clams, Lake Clark National Park & Preserve, Alaska.

Brown bear sow looks for silver salmon in Silver Salmon Creek, Lake Clark National Park & Preserve.

A brown bear sow and her spring cub dig for clams in the mudflats at low tide in Lake Clark National Park & Preserve, Alaska.

A coastal brown bear sow stands on a gravel beach next to the horn river looking for fish in lake clark national park & preserve chinitna bay; Alaska united states of america

Brown bear (Ursus arctos) in Brooks River below Brooks Falls clawing at sockeye salmon (Oncorhynchus nerka), Katmai National Park and Preserve; Alaska, United States of America

Brown bear (Ursus arctos) male and female courting prior to mating, sitting on boulder in Brooks River, Katmai National Park and Preserve; Alaska, United States of America

Brown bear (Ursus arctos) sow with three cubs resting on sandy shore of Brooks River, while school of sockeye salmon (Oncorhynchus nerka) swim in river in background, Katmai National Park and Preserve; Alaska, United States of America

A coastal brown bear stands in the middle of horn river looking for migrating salmon at chinitna bay lake clark national park and preserve; Alaska united states of america

Grizzly bear (Ursus arctos) fishing for sockeye salmon at Brooks Falls in Katmai National Park & Preserve, Southwest Alaska; Alaska, United States of America

A brown bear cub and its mother look over their shoulders while walking of the bank of horn river at chinitna bay lake clark national park and preserve; Alaska united states of america

Grizzly bear (Ursus arctos) fishing for sockeye salmon at Brooks Falls in Katmai National Park & Preserve, Southwest Alaska; Alaska, United States of America

Three brown bear spring cubs wait on the bank of horn river for their mother to bring a fish at chinitna bay lake clark national park and preserve; Alaska united states of america

Brown bear (Ursus arctos) standing in Brooks River while fishing for sockeye salmon, Katmai National Park and Preserve, Southwest Alaska

Brown bear (Ursus arctos) standing in Brooks River while fishing for sockeye salmon, Katmai National Park and Preserve, Southwest Alaska

Brown bear (Ursus arctos) wading in Brooks River while fishing for sockeye salmon, Katmai National Park and Preserve, Southwest Alaska

A brown bear sow looks out onto the water in Kukak Bay, Katmai National Park & Preserve, Alaska.