Head into the high country of the Rocky Mountains to examine the imperiled whitebark pine and meet the people determined to save it. As a keystone species, the stately five-needle pine provides shelter to dozens of high mountain creatures while its nutritious cones are packed with protein-rich seeds – a major food source for grizzly bears. A clever bird, the Clark’s nutcracker, depends upon the seeds, too, and the whitebark pine relies on the bird to distribute its seeds.