On remote Wragel Island in the Russian Arctic the polar bears survive, but just barely. Sergey Gorhskov spent three years traveling to this nearly-deserted sanctuary to document the wildlife of this fragile reserve. Once known as a 'polar bear maternity ward' with close to 400 denning mothers raising their cubs annually the island now hosts only 60 birthing females. Climate change and its effect on the bears' hunting patterns threatens the island's population which is stressed by hunger and competition. Mothers lead their young on a search for food, nearly 100 bears collect at one beach to feed on washed-up walruses and lone animals range this harsh island home in this gallery of images.