During the breeding season Pigeon guillemots are easily seen flying low over the water along rocky coastlines or in estuaries. They have striking red feet, legs, and mouth linings and their large white wing patches contrast markedly with the rest of their black plumage. When standing on land they have a distinctive upright posture and often emit a high-pitched squeal. In the non breeding season they move offshore and look entirely different when their black plumage becomes mottled with white.
The Pigeon guillemot occurs during the breeding season all along the Oregon coast wherever offshore islands or rocky cliffs are present. Most breed in small colonies of under 40 birds.