Diet Overlap

Larus schistisagus (Slaty-backed Gull)
Lagopus muta (Rock Ptarmigan)

Common Diet

Empetrum nigrum (black crowberry)

Common Habitat

Aleutian Islands Biosphere Reserve
Arctic National Wildlife Refuge
Japan
Kronotskiy Biosphere Reserve
Nihonkai evergreen forests
Nihonkai montane deciduous forests
North America
South Sakhalin-Kurile mixed forests
Taiheiyo evergreen forests
Taiheiyo montane deciduous forests

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