diagnostics
50-53 cm, 700 g. The sexes differ in colouration. Male black, with contrasting white patch on ear coverts. Upperparts barred black and brown; a white collar extends across the mantle. Crown brown. Wing coverts white, forming a broad edge on folded wing, conspicuous in flight (but lacks white primaries of Northern Black Korhaan). Bill red with grey tip and pale sub-terminal bar. Legs bright yellow. Smaller female has head, neck and breast buff-brown, with black restricted to belly, and lacks white mantle bar. Juvenile resembles female but dorsal and flight feathers pale-tipped (Allan 2005).
