Diet Overlap

Calcarius lapponicus (Lapland Longspur) Lemmus sibiricus (brown lemming)

Common Diet

Arctagrostis latifolia (wideleaf polargrass) Betula intermedia (dwarf birch) Carex bonanzensis (Yukon sedge) Empetrum nigrum (black crowberry)

Common Habitat

Alaska Peninsula montane taiga Alaska-St. Elias Range tundra Arctic coastal tundra Arctic foothills tundra Arctic National Wildlife Refuge Aulavik National Park Auyuittuq National Park Baffin coastal tundra Beringia lowland tundra Beringia upland tundra British Columbia mainland coastal forests Brooks-British Range tundra Chukchi Peninsula tundra Davis Highlands tundra Denali Biosphere Reserve High Arctic tundra Interior Alaska-Yukon lowland taiga Interior Yukon-Alaska alpine tundra Ivvavik National Park Kluane National Park and Reserve Kronotskiy Biosphere Reserve Low Arctic tundra Middle Arctic tundra North America Northeast Siberian coastal tundra Northwest Russian-Novaya Zemlya tundra Ogilvie-MacKenzie alpine tundra Ostrov Vrangelya (Wrangel Island) Zapovednik Pacific Coastal Mountain icefields and tundra Queen Maud Gulf Bird Sanctuary Scandinavian and Russian taiga Sirmilik National Park Southern Hudson Bay taiga Taimyr-Central Siberian tundra Taimyrsky Biosphere Reserve Tuktut Nogait National Park Ukkusiksalik National Park Walker Bay Field Station Wapusk National Park Wrangel Island arctic desert Yamal-Gydan tundra