Errata: The Alaska brown bear, Ursus arctos middendorfii, is also referred to as the Kodiak bear. It is so closely related to the Polar bear, Ursus maritimus, crosses between the two species produce fertile hybrids. The polar bear is the most carnivorous of bears, but still an omnivore. While strictly carnivorous during winter, it will eat anything and everything in sight during summer [much like human children].
And in the spirit of staying on topic, if I happened to run across a white tiger, I would call it... Nice kitty... in my best falsetto voice.