There are actually 3 subspecies of grizzly, although some experts insist that the inland and coastal brown bears are of the same subspecies. Both of these American grizzly bears are the descendants of Ussuri brown bears ( black grizzly ) that crossed over to North America from Asia during the Ice Age. It is believed that the Kodiak bears descended from the Kamchatka bears in much the same way. The average weight, to the best of my knowledge, of all 3 types of grizzly is roughly 490 pounds. How well would an African lion do in a face-off against a 490 pound grizzly bear?