Diet Overlap

Lagopus lagopus (Willow Ptarmigan)
Calidris tenuirostris (Great Knot)

Common Diet

Arctostaphylos alpinus (alpine bearberry)
Empetrum nigrum (black crowberry)
Vaccinium uliginosum (bog blueberry)

Common Habitat

Aleutian Islands Biosphere Reserve
Bering tundra
Cherskii-Kolyma mountain tundra
Chukchi Peninsula tundra
Kronotskiy Biosphere Reserve
Manchurian mixed forests
North America
Northeast Siberian taiga

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.