Diet Overlap

Cepphus columba (Pigeon Guillemot)
Phocoena phocoena (Harbor Porpoise)

Common Diet

Clupea pallasii (Pacific herring)

Common Habitat

California Coast Ranges Biosphere Reserve
Channel Islands National Marine Sanctuary
Channel Islands National Park
Farallon National Wildlife Refuge
Gwaii Haanas National Park Reserve
Kronotskiy Biosphere Reserve
Pacific Rim National Park Reserve
Point Reyes National Seashore
Redwood National Park

Attributes / relations provided by
♦ 1A COMPARISON OF THE BREEDING AND FEEDING ECOLOGY OF PIGEON GUILLEMOTS AT NAKED AND JACKPOT ISLANDS IN PRINCE WILLIAM SOUND, D. Lindsey Hayes, APEX: 95163 F. U.S. Fish and Wildlife Service, Anchorage, AK. (1996)
♦ 2THE DIET OF HARBOUR PORPOISE (PHOCOENA PHOCOENA) IN THE NORTHEAST ATLANTIC, M. B. SANTOS & G. J. PIERCE, Oceanography and Marine Biology: an Annual Review 2003, 41, 355–390