The Corps of Discovery first saw this bird "on the hights of the rockey mountains" while camped with the Shoshone Indians near Idaho's Lemhi River. The Clark's nutcracker may have an even better mapping ability than Captain Clark, its namesake. A hoarder of whitebark pine nuts, the nutcracker can locate as many as 2,000 different caches up to eight months after it buried them. Still, it misses some, which germinate and grow. Unfortunately, blister rust is killing off whitebark pines, depriving Clark's nutcrackers of a primary food source.

Not listed.