Diet Overlap

Lagopus lagopus (Willow Ptarmigan) Corvus corax (Northern Raven)

Common Diet

Arctostaphylos alpinus (alpine bearberry) Empetrum nigrum (black crowberry) Vaccinium uliginosum (bog blueberry) Vaccinium vitis-idaea (lingonberry)

Common Habitat

Alaska Peninsula montane taiga Alaska-St. Elias Range tundra Alberta Mountain forests Aleutian Islands Biosphere Reserve Aleutian Islands tundra Amur meadow steppe Arctic coastal tundra Arctic foothills tundra Arctic National Wildlife Refuge Aulavik National Park Baikalskiy Biosphere Reserve Barguzinskiy Biosphere Reserve Beinn Eighe National Nature Reserve Beinn Iadain and Beinn na h`Uamha Berezinskiy Zapovednik Bering tundra Beringia lowland tundra Beringia upland tundra Bonanza Creek LTER Site British Columbia mainland coastal forests Brooks-British Range tundra Cairngorms Cairnsmore of Fleet, Silver Flowe, and Merrick Kells Caledon conifer forests Cascade Mountains leeward forests Celtic broadleaf forests Central British Columbia Mountain forests Central Pacific coastal forests Cherskii-Kolyma mountain tundra Chukchi Peninsula tundra Cook Inlet taiga Copper Plateau taiga Da Hinggan-Dzhagdy Mountains conifer forests Darvinsky Zapovednik Denali Biosphere Reserve East Siberian taiga Eastern Canadian forests Eastern Canadian Shield taiga Elimyssalon alue Fraser Plateau and Basin complex Gates of the Arctic National Park Glacier Bay National Park and Preserve Great Lakes Basin desert steppe Greenwater Provincial Park Gros Morne National Park Haapasuo-Syysniemi-Rutajärvi-Kivijärvi High Arctic tundra Interior Alaska-Yukon lowland taiga Interior Yukon-Alaska alpine tundra Isle of Rum National Nature Reserve Iso Koihnanneva Ivvavik National Park Jänessuo Jasper National Park Joutsenaapa - Kaita-aapa Kamchatka Mountain tundra and forest tundra Kamchatka-Kurile meadows and sparse forests Kamchatka-Kurile taiga Katunsky Biosphere Reserve Kazakh forest steppe Kazakh steppe Kazakh upland Khangai Mountains alpine meadow Khangai Mountains conifer forests Killarney National Park Kinloch and Kyleakin Hills Kluane National Park and Reserve Kola Peninsula tundra Krkonose Kronotskiy Biosphere Reserve Laidauredeltat Lake Torne Area Laplandskiy Biosphere Reserve Low Arctic tundra Luiron suot Manchurian mixed forests Middle Arctic tundra Midwestern Canadian Shield forests Mongolian-Manchurian grassland Moor House-Upper Teesdale Biosphere Reserve Muskwa-Slave Lake forests Nahanni National Park Reserve Newfoundland Highland forests Noatak Biosphere Reserve North America North Atlantic moist mixed forests North Central Rockies forests Northeast Siberian taiga Northern Canadian Shield taiga Northern Cordillera forests Northern Karelian Northern Pacific coastal forests Northern transitional alpine forests Northwest Russian-Novaya Zemlya tundra Northwest Territories taiga Ogilvie-MacKenzie alpine tundra Okhotsk-Manchurian taiga Okskiy Biosphere Reserve Ostrov Vrangelya (Wrangel Island) Zapovednik Pacific Coastal Mountain icefields and tundra Parc National Suisse Pechoro-Ilychskiy Biosphere Reserve Prince Albert National Park Queen Charlotte Islands Queen Maud Gulf Bird Sanctuary Rödkallen-SörÄspen Sakhalin Island taiga Sarmatic mixed forests Sayan Alpine meadows and tundra Sayan Intermontane steppe Sayan montane conifer forests Sayano-Shushenskiy Biosphere Reserve Scandinavian and Russian taiga Scandinavian Montane Birch forest and grasslands Selenge-Orkhon forest steppe Sokhondinskiy Biosphere Reserve South Avalon-Burin oceanic barrens South Pennine Moors South Sakhalin-Kurile mixed forests South Siberian forest steppe Southern Hudson Bay taiga St. Kilda National Nature Reserve Suurisuo-Sepänsuo-Paanasenneva-Teerineva Taimyr-Central Siberian tundra Terra Nova National Park Teuravuoma-Kivijärvenvuoma Torngat Mountain tundra Trans-Baikal Bald Mountain tundra Trans-Baikal conifer forests Tsentral'no-Lesnoy Biosphere Reserve Tsentral'no-Sibirskiy Biosphere Reserve Tuktut Nogait National Park Ubsunurskaya Kotlovina (Ubsunur Depression) Ukkusiksalik National Park Ural montane forests and tundra Viiankiaapa Walker Bay Field Station Wapusk National Park West Siberian taiga Western Siberian hemiboreal forests Wood Buffalo National Park Wrangell-St. Elias National Park and Preserve Yamal-Gydan tundra Yukon Interior dry forests