Diet Overlap

Clangula hyemalis (Oldsquaw)
Fratercula corniculata (Horned Puffin)

Common Diet

Ammodytes hexapterus (Stout sand lance)

Common Habitat

Alaska Maritime National Wildlife Refuge
Aleutian Islands Biosphere Reserve
Arctic National Wildlife Refuge
California Coast Ranges Biosphere Reserve
Clayoquot Sound
Farallon National Wildlife Refuge
Glacier Bay National Park and Preserve
Kronotskiy Biosphere Reserve
North America
Olympic Biosphere Reserve
Ostrov Vrangelya (Wrangel Island) Zapovednik
Point Reyes National Seashore
Redwood National Park

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
♦ 2Breeding ecology of Horned Puffins (Fratercula corniculata) in Alaska: annual variation and effects of El Niño, A.M.A. Harding, J.F. Piatt, and K.C. Hamer, Can. J. Zool. 81: 1004–1013 (2003)