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The knob-billed duck (Sarkidiornis melanotos) or African comb duck is a type of duck found along the tropical/sub-tropical wetlands and waterways of Sub-Saharan Africa and the island of Madagascar, as well as most of South Asia and mainland Indochina. Most taxonomic authorities classify the knob-billed duck and the comb duck separately.
Like every other duck on this list, the males are the real showstoppers since they are the ones with the bright red beak that lends to their dramatic profile. Female red-crested pochards, on the ...
Adult females, however, have a yellow to brown head and neck. The breast is brown, the belly is white and the rest of the body is a gray to brown. The female bills are slate with a dark tip that is separated by a blue ring. Females remain the same color year round. [6] The eyes are brown, as in all other Aythya species. [4]
This is a list of the breeds of domestic duck which have official recognition at national or international level. [1]Most breeds of duck derive from the wild mallard, Anas platyrhynchos, while a small minority are descendants of the Muscovy duck, Cairina moschata.
Domesticated birds may look similar; most are dark brown or black mixed with white, particularly on the head. [8] Other colors, such as lavender or all-white, are also seen. Both sexes have a nude black-and-red or all-red face; the drake also has pronounced caruncles at the base of the bill and a low erectile crest of feathers. [6]
The blue-billed duck (Oxyura australis) is a small Australian stiff-tailed duck, with both the male and female growing to a length of 40 cm (16 in). [ 2 ] [ 3 ] The male has a slate-blue bill which changes to bright-blue during the breeding season, hence the duck's common name.
The black-bellied whistling duck (Dendrocygna autumnalis), formerly called the black-bellied tree duck, is a whistling duck that before 2000 bred mainly in the southernmost United States, Mexico, and tropical Central to south-central South America. It can be found year-round in much of the United States.
Its eyes are red with black pupils. The crown and the feathers surrounding the eyes are dark brown or blackish. The tail feathers are also dark, sometimes black. It has a black beak and dark grey to black legs and webbed feet. It moults twice a year and also has an annual wing feather moult. It is a medium-sized duck around 50–60 cm in length.