COMB / KNOB-BILLED DUCKS (SARKIDIORNIS MELANOTOS) Published on December 3, 2012December 3, 2012 by Rolling HarbourLeave a comment COMB / KNOB-BILLED DUCKS (Sarkidiornis melanotos) 1. The male, with the characteristic prominent knob on its head 2. The female comb-duck. Both sexes have wonderfully coloured feathers, though the females are less bright Share this: Click to email a link to a friend (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on X (Opens in new window) X Click to share on Pinterest (Opens in new window) Pinterest Click to share on Reddit (Opens in new window) Reddit Click to print (Opens in new window) Print Like Loading...