The Clark's Nutcracker has a special pouch under its tongue that it uses to carry seeds long distances. The nutcracker harvests seeds from pine trees and takes them away to hide them
Conserving Imperiled Whitebark Pine and Clark's Nutcrackers Across the Pacific Northwest (U.S. National Park Service)
Is the Fate of Whitebark Pine in the Beak of Clark's Nutcracker? (U.S. National Park Service)
The Clark's nutcracker: My whitebark pine story - American Forests
Aw, nuts! -A Pine Forest and a Bird - Wintu Audubon Society
Forest Foragers of Whitebark Pine Seeds - Wenatchee Naturalist