Diet Overlap

Clangula hyemalis (Oldsquaw)
Calidris minutilla (Least Sandpiper)

Common Diet

Mytilus edulis (Blue mussel)

Common Habitat

Acadia National Park
Alaska Maritime National Wildlife Refuge
Alaska-St. Elias Range tundra
Aleutian Islands Biosphere Reserve
Algonquin Provincial Park
Apostle Islands National Lakeshore
Arctic National Wildlife Refuge
Assateague Island National Seashore
Banff National Park
Bighorn Canyon National Recreation Area
Blackbeard Island National Wildlife Refuge
Blackwater National Wildlife Refuge
Bombay Hook National Wildlife Refuge
Brooks-British Range tundra
Bruce Peninsula National Park
Cabrillo National Monument
California Coast Ranges Biosphere Reserve
Canaveral National Seashore
Cape Breton Highlands National Park
Cape Cod National Seashore
Cape Hatteras National Seashore
Cape Lookout National Seashore
Carolinian-South Atlantic Biosphere Reserve
Central Gulf Coastal Plain Biosphere Reserve
Chattahoochee River National Recreation Area
Chesapeake & Ohio Canal National Hist. Park
Colonial National Historic Park
Copper Plateau taiga
Denali Biosphere Reserve
Dungeness
Effigy Mounds National Monument
Elk Island National Park
Elkhorn Slough Preserve
Farallon National Wildlife Refuge
Fathom Five National Marine Park
Florida Keys National Marine Sanctuary
Forillon National Park
Fort Pulaski National Monument
Fundy National Park
Gateway National Recreation Area
Georgian Bay Islands National Park
Glacier Bay National Park and Preserve
Glen Canyon National Recreation Area
Golden Gate National Recreation Area
Gros Morne National Park
Gwaii Haanas National Park Reserve
Interior Alaska-Yukon lowland taiga
Interior Yukon-Alaska alpine tundra
Ivvavik National Park
Jasper National Park
Kejimkujik Seaside Adjunct
Kluane National Park and Reserve
Kouchibouguac National Park
Lake Mead National Recreation Area
Lake Meredith National Recreation Area
Lake Superior Provincial Park
Long Point Biosphere Reserve
Low Arctic tundra
Mingan Archipelago National Park Reserve
Mount Arrowsmith
Nahanni National Park Reserve
Niagara Escarpment Biosphere Reserve
North America
Northern Canadian Shield taiga
Olympic Biosphere Reserve
Pacific Coastal Mountain icefields and tundra
Pacific Rim National Park Reserve
Padre Island National Seashore
Pictured Rocks National Lakeshore
Point Pelee National Park
Point Reyes National Seashore
Polar Bear Provincial Park
Prince Edward Island National Park
Pukaskwa National Park
Queen Maud Gulf Bird Sanctuary
Redwood National Park
Rocky Mountain Biosphere Reserve
Rondeau Provincial Park
Saguenay - St. Lawrence Marine Park
Saint Lawrence Islands National Park
San Juan Island National Historical Park
Santa Monica Mountains National Recreation Area
Santee Coastal Reserve and Washo Reserve
Sevilleta LTER Site
Sleeping Bear Dunes National Lakeshore
South Atlantic Coastal Plain Biosphere Reserve
Southern Hudson Bay taiga
Tawas Point State Park
Terra Nova National Park
Torngat Mountain tundra
Tuktut Nogait National Park
Ukkusiksalik National Park
Upper Miss. River Nat'l Wildlife Refuge
Valley Forge National Historical Park
Virginia Coast Biosphere Reserve
Voyageurs National Park
Walker Bay Field Station
Wapusk National Park
Waterton Biosphere Reserve
Wrangell-St. Elias National Park and Preserve
Yellowstone 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
♦ 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.