Size: L. 25 cm. Wt: 80 g. Males and females are similar. This species is seasonally dimorphic.

Breeding Adult: back and wings mottled dark brown and black, with fine white spots; head heavily streaked dark brown, with white eyebrow and fine white eye ring; breast heavily streaked with dark brown; sides and belly usually spotted and barred, but may be white; bill long, straight, dark; legs long, yellow to orange

Winter Adult: back and wings dark brown, feathers edged in faint white spots; head streaked pale brown, with white eyebrow and fine white eye ring; breast and sides faintly smudged with pale brown; belly white; bill and legs as in breeding adult

Juvenile: back and wings dark brown, with golden-brown spotting; head streaked brown, with white eyebrow and fine white eye ring; breast and sides faintly spotted brown; belly white; bill and legs as in adults