With caribou herds changing migration routes - there has been an increase in grizzly bears in places they have never been before. That includes the Northwest Territories, home to polar bears previously. The grizzlies traveled north, following the caribou, and then mating with the local polar bears.
Recently a hunter in the community of Ulukhaktok, shot a polar bear, and her two cubs. The mother bear was pure white, and was a polar bear. One of the cubs had dark fur, and one had white fur but with brown fur on the legs.
Seeing grolar bears has become an increasing occurrence in the area. One was found in 2006, the last one hunted was in 2010. From CBCNews.com .