Michael Quinton / Clark's Nutcracker (Nucifraga columbiana) feeding on Whitebark Pine (Pinus albicaulis) nuts during snowfall in winter, Idaho

Oriol Alamany / Clark's Nutcracker (Nucifraga columbiana) adult feeding young, Banff National Park, Rocky Mountains, Alberta, Canada

Oriol Alamany / Clark's Nutcracker bird (Nucifraga columbiana), adult feeding young, Banff National Park, Rocky Mountains, Alberta, Canada

Mark Taylor / Clark's Nutcracker (Nucifraga columbiana) eating seeds from its favourite food plant, the Whitebark Pine (Pinus albicaulis), Western USA

Donald M. Jones / Clark's Nutcracker (Nucifraga columbiana) sitting on a Spruce (Picea sp) tree during a light snow fall, Alberta, Canada

Donald M. Jones / Clark's Nutcracker (Nucifraga columbiana) perching on a Spruce (Picea sp) tree during a light snow fall, Alberta, Canada

Steven Kazlowski / Clark's nutcracker (Nucifraga columbiana) perched on rock, Upper Enchantments Lake Basin, Alpine Lakes Wilderness, Okanogan-Wenatchee National Forest, Cascade Range, Washington, Summer

Steven Kazlowski / Clark's nutcracker (Nucifraga columbiana) foraging, Upper Enchantments Lake Basin, Alpine Lakes Wilderness, Okanogan-Wenatchee National Forest, Cascade Range, Washington, Summer

Konrad Wothe / Clark's Nutcracker (Nucifraga columbiana) in pine, Mount Rainier National Park, Washington

George McCarthy / Clark's Nutcracker (Nucifraga columbiana) perched on pine tree, Glacier National Park, Alberta, Canada

George McCarthy / Clark's Nutcracker (Nucifraga columbiana) perched on pine tree, Glacier National Park, Alberta, Canada

George McCarthy / Clark's Nutcracker (Nucifraga columbiana) perched in a Pine tree with purple pine cones, Alberta, Canada