18 - 21.5 cm. 126 - 144 g. Bill sawing, short, robust, slightly curved. Overall plumage patterned with rufous, white and black. Feathers that cover upperwings cinnamon-gray, spotted with brown and black. Legs dusky flesh to grayish, short, robust. Males and females are different. Male: Bill blackish. Crest and crown chestnut. Forehead, sides of head and throat black. White lines above and below the eye. Nape cinnamon spotted with buff and white form lines. Back patterned with pale gray, cinnamon-rufous, black and white. Chest and belly white, boldly and coarsely scalloped black. Vent and feathers that cover undertail cinnamon to reddish-brown. Female: Eyebrow and throat buff contrast with dark crown and dusky buff line through the eye. Back and rump patterned with gray pale brown, whitish and black. Chest and flanks white coarsely scalloped black; belly appears boldly spotted whitish. The immature has the feathers that cover upperwings with buff marks on tip. Juveniles are similar to females but underparts dusky gray, white shaft streaks on back, chest and flanks.