Size: L: 30 cm. Wt: 220 g. Males and females are similar. This species is seasonally dimorphic.

Breeding Adult: back and wings mottled white and blackish; white stripe extends across forehead, over crown and nape and down sides of breast; face, centre breast, belly, and flanks black; undertail coverts white; bill short, straight, black; legs blackish

Winter Adult/Juvenile: upperparts mottled blackish-brown, with small amounts of golden brown and whitish; face whitish, with broad but faint streak over eye; underparts pale greyish-brown, with some light greyish streaking; bill short, straight, black; legs blackish