Diet Overlap

Clangula hyemalis (Oldsquaw)
Calidris maritima (Purple Sandpiper)

Common Diet

Mytilus edulis (Blue mussel)

Common Habitat

Acadia National Park
Arctic desert
Atlantic mixed forests
Aulavik National Park
Baie d'Audierne
Baltic mixed forests
Caerlaverock National Nature Reserve
Cape Breton Highlands National Park
Cape Cod National Seashore
Cape Hatteras National Seashore
Cape Lookout National Seashore
Carmarthen Bay and Estuaries/ Bae Caerfyrddin ac Aberoedd
Carolinian-South Atlantic Biosphere Reserve
Celtic broadleaf forests
Chukchi Peninsula tundra
Dee Estuary/ Aber Dyfrdwy
DOÑANA
Donegal Bay SPA
English Lowlands beech forests
Florida Keys National Marine Sanctuary
Forillon National Park
Fort Pulaski National Monument
Fundy National Park
Gateway National Recreation Area
Gros Morne National Park
High Arctic tundra
Iceland boreal birch forests and alpine tundra
Isle of Rum National Nature Reserve
Kola Peninsula tundra
Lake Torne Area
Laplandskiy Biosphere Reserve
Long Point Biosphere Reserve
Middle Arctic tundra
Mingan Archipelago National Park Reserve
Moray Firth
Neusiedler See-Osterreichischer Teil
Niagara Escarpment Biosphere Reserve
North America
North Atlantic moist mixed forests
North Bull Island
North Norfolk Coast
North Northumberland Dunes
Northwest Russian-Novaya Zemlya tundra
Prince Edward Island National Park
Quttinirpaaq (Ellesmere Island) National Park Reserve
Rondeau Provincial Park
Saaristomeri
Saguenay - St. Lawrence Marine Park
Sarmatic mixed forests
Scandinavian and Russian taiga
Scandinavian coastal conifer forests
Scandinavian Montane Birch forest and grasslands
Sefton Coast
Sirmilik National Park
South Atlantic Coastal Plain Biosphere Reserve
Tagamõisa
Taimyr-Central Siberian tundra
Terra Nova National Park
Tweed Estuary
Ukkusiksalik National Park
Urdaibaiko Itsasadarra / Ría de Urdaibai
Virginia Coast Biosphere Reserve

Attributes / relations provided by
♦ 1Winter feeding ecology and trophic relationships of Oldsquaws and White-winged Scoters on Kachemak Bay, Alaska, Gerald A. Sanger and Robert D. Jones, Jr., Canadian Wildlife Service, 1984
♦ 2R. W. Summers , S. Smith , M. Nicoll & N. K. Atkinson (1990) Tidal and sexual differences in the diet of Purple Sandpipers Calidris maritima in Scotland, Bird Study, 37:3, 187-194