Knob-billed Duck (Sarkidiornis melanotos) Madagascar, Southern Africa, India
Knob-billed duck - Sarkidiornis melanotos - Chambal India
Knob-billed duck - Sarkidiornis melanotos - Chobe NP Botswana
Knob-billed duck - Sarkidiornis melanotos - Andisabe NP Madagascar
Knob-billed duck - Sarkidiornis melanotos - Thale Noi Wetlands Patthalung Thailand