Other Names: none
Distribution: coasts of Siberia and Alaska in summer; South Pacific waters in winter.
Size: 26-30 cm in length with a 50-55 cm wingspan.
Plumage: Uniform gray above, with a whitish eyebrow and dark rump and tail. Breeding adults have heavily barred undersides. Non-breeding adults are off-white below, with a gray wash on the flanks. The legs are greenish-yellow and the beak and eyes are black.