National Geographic Documentary - Two Predators Reign Supreme: Grizzly Bears and Wolves. Size and power square off against speed and teamwork, as mighty grizzly bears contend with powerful packs of wolves for control of the food supply. Though these two fearsome hunters would normally rule their ranges uncontested, in Yellowstone they must share resources, or face starvation. A grizzly in his prime is the undisputed master, able to take down prey as easily as he is able to dominate the fresh kills of other predators. The wolves of Yellowstone must use their numbers to their advantage, organizing to take down their prey and defend the spoils of their hunts from the bears. Together, a strong pack of wolves can challenge a solitary grizzly, and defeat it. As these two fierce competitors test their strategies for survival against each other, an entire food chain of scavengers survive in their wake. Crafty coyotes and cunning crows take advantage of the predators’ feuds to make the most of any felled feast.