Size: L: 50-55 cm. Wt: Males: 630 g. Females: 800 g. Males and females are somewhat dimorphic in size, but not in plumage.This species is not seasonally dimorphic.

Adult: body chunky; upperparts mottled brown and white; no ear tufts; facial disk demarcated with blackish line, vertical blackish line between eyes; eyes dark; upper breast with dark brown barring, lower breast buffy, with dark streaks; bill small, hooked, yellow; legs with whitish feathering; toes yellow, taloned

Nestling: semialtricial and downy; down thick, soft, white; bill small, hooked; feet taloned