Other Names: Oldsquaw (obsolete)
Distribution: arctic coasts in summer; northern coastal waters in winter.
Size: 38-58 cm in length with a 70-74 cm wingspan.
Plumage: Males are boldly patterned in matte black and white (mainly white in winter, mainly black in summer), with very long, slender central tail feathers that are distinctive of the species. Females are generally duller and lack the long tail feathers. Both sexes show dark unpatterned wings in flight. The bill is black with a yellow tip and the eyes are red.