Other Names: none
Distribution: Alaska and northern Canada in summer; coasts of temperate North America in winter.
Size: 28-30 cm in length with a 90-100 cm wingspan.
Plumage: Silvery gray above, with conspicuous white, wedge-shaped patches on the leading edge of the outer wings. The head is black in breeding adults, and white in winter with a dark spot behind the eye. Juveniles have dark markings on the upper surface of the wings and a black tail band. The legs are peach and the beak and eyes are black.