Cape Tatnam on the western shore of Hudson Bay is the home of the world's most southerly polar bear population. Hudson Bay is frozen for half of each year, and the bears live out on the ice, hunting seal, their favorite food. In the summer, polar bears are stranded on the coast cut off from their main food source. With a longer ice-free period, the sight of one of the world'' fiercest predators grazing on seaweed is becoming more common on the Western shores of Hudson Bay. The long summer and fall has been an especially tough time for young polar bears and mothers with cubs. Polar bears in this region have adapted to eating nothing, or snacking on less nutritious food, like grass, seaweed or bird eggs during the summer months.