Adult male Polar Bears (Ursus maritimus) in ritualistic fighting stance (injuries are rare) near Churchill, Manitoba, Canada.

Adult male Polar Bears (Ursus maritimus) in ritualistic fighting stance (injuries are rare) near Churchill, Manitoba, Canada.

Adult male Polar Bears, Ursus maritimus, in ritualistic fighting (this almost never leads to serious injury) near Churchill, northern Manitoba, Hudson Bay, Canada

Adult male Polar Bear, Ursus maritimus, shaking like a dog after scratching his back on a willow tree near Churchill, northern Manitoba, Hudson Bay, Canada

Curious young male Polar Bear, Ursus maritimus, standing against Tundra Buggy near Churchill, northern Manitoba, Hudson Bay, Canada

Female Polar Bear, Ursus maritimus, on fresh snow near Churchill, northern Manitoba, Hudson Bay, Canada

Male Polar Bears, Ursus maritimus, engaged in ritualistic mock fighting (serious injuries are rare), near Churchill, northern Manitoba, Hudson Bay, Canada

Male Polar Bears, Ursus maritimus, engaged in ritualistic mock fighting (serious injuries are rare), near Churchill, northern Manitoba, Hudson Bay, Canada

Habituated Polar Bears, Ursus maritimus, feeding in the dump at night near Churchill, northern Manitoba, Hudson Bay, Canada

Tranquilized Polar Bear mother and cub, Ursus maritimus, being prepared for transfer by helicopter near Churchill, northern Manitoba, Hudson Bay, Canada - They hold the polar bears while there are problems near town. Then when the ice freezes they help t

Tranquilized Polar Bears, Ursus maritimus, being transferred by helicopter near Churchill, northern Manitoba, Hudson Bay, Canada

Polar Bear cubs snuggled and resting on mothers body, Ursus maritimus, taiga, Churchill, Manitoba, Hudson Bay, Canada

Adult male Polar Bear, Ursus maritimus, yawning while resting near Churchill, northern Manitoba, Hudson Bay, Canada