Adult male Polar Bear, Ursus maritimus, resting on taiga outside Churchill, northern Manitoba, Hudson Bay, Canada

Polar Bear Mother protecting cubs, Ursus maritimus, taiga, Churchill, Manitoba, Hudson Bay, Canada

Polar Bear (Ursus maritimus)Male standing on hind legs outside Churchill, Manitoba, Canada.

Adult male Polar Bear, Ursus maritimus, close-up near Churchill, northern Manitoba, Hudson Bay, Canada

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

Adult male Polar Bear, Ursus maritimus, on frozen lake near Churchill, northern Manitoba, Hudson Bay, Canada

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

Adult male Polar Bear, Ursus maritimus, (head detail) 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

Polar Bears (Ursus maritimus) Two adult males swimming in open water in Hudson Bay (o avoid the summer heat and insects )nar boat outside Churchill, Manitoba, Canada.

Adult male Polar Bear, Ursus maritimus, scratching his back/sleeping on ice near Churchill, northern Manitoba, Hudson Bay, Canada

Polar Bear (Ursus maritimus) Adult preparing to be transferred via helicopter from the Bear Jail outside Churchill, Manitoba, Canada.

Adult Polar Bear (Ursus maritimus) following in tracks on open tundra outside Churchill, Manitoba, Canada.