Mother and cub struggling back to shore on Hudson Bay after being trapped at sea on ice which broke up due to a weather change. (Featured in Amazing Wildlife and others.) The cub often had to swim when the mother could walk, at times they both had to swim. They would have been making their way back to shore for 10 days. Amazing feat for that little cub!! Polar bear, Ursus maritimus, which means “sea bear”. Churchill, Polar Bear Pt, Wapusk National Park, Canada, N America. Canon 500D, zoom lens.