Comb Duck/ Knob-billed Duck Sarkidiornis melanotos

Comb Duck
Comb Duck male
The unusual Comb drake with comb. The Comb Duck has two subspecies: Sarkidiornis melanotos melanotos (above/immediately below) which has grey flanks and is native to sub-Saharan Africa and tropical Asia and Sarkidiornis melanotos sylvicola (further below) which has black flanks and is native to tropical South America.
Comb Duck
Comb Duck female
Comb duck, female, doesn't have a comb on the bill.
Comb Duck male
Comb Duck wing sheen
Some class the South American, dark-flanked duck as a separate species: the Knob-billed Duck.
Comb Duck wing sheen
Comb Duck wing sheen
Comb Duck
In the sunlight the Comb Duck's plumage shows beautiful iridescence.
Comb Duck duet with Fulvous Comb duet
Comb Duck tongue out Putting tongue out
Comb Duck ducked Comb duck ducked
Grey-sided Comb Duck
Grey-flanked Comb Duck
Grey-sided Comb Duck
More of the grey-sided Comb Duck of Africa/Asia. Comb Ducks eat mainly grass seeds and grains but also take aquatic plants and insects.
Black-sided Comb Duck
Black-flanked Comb Duck
Black-sided Comb Duck
More of the black-sided Comb Duck of the Americas. Comb Ducks are among the very few ducks that are polygamous (have more than one mate); most duck species are seasonally monogamous (some mate for life, like most geese/swans).