Diet Overlap

Lagopus lagopus (Willow Ptarmigan)
Larus schistisagus (Slaty-backed Gull)

Common Diet

Empetrum nigrum (black crowberry)

Common Habitat

Aleutian Islands Biosphere Reserve
Arctic National Wildlife Refuge
Kronotskiy Biosphere Reserve
Manchurian mixed forests
North America
Ostrov Vrangelya (Wrangel Island) Zapovednik
South Sakhalin-Kurile mixed forests

Attributes / relations provided by
1Making The Forest And Tundra Wildlife Connection
2del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.