Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Aves
Order: Anseriformes
Family: Anatidae
Genus: Anas
Species: A. platyrhynchos
Subspecies: A. platyrhynchos ssp. domesticus
Trinomial name: Anas platyrhynchos domesticus
Common name: Domestic duck

Domesticated ducks are ducks that are raised for meat, eggs and down. Many ducks are also kept for show, as pets, or for their ornamental value. Almost all varieties of domesticated duck are descended from the mallard (Anas platyrhynchos) and the Muscovy duck (Cairina moschata). They are extremely variable in size, shape and in colour. Many breeds of domestic ducks cannot fly.
Ducks have been farmed for thousands of years, possibly starting in Southeast Asia. In the Western world, they are not as popular as the chicken, because chickens have much more white lean meat and are easier to keep confined, making the total price much lower for chicken meat, whereas duck is comparatively expensive. While popular in haute cuisine, duck appears less frequently in the mass-market food industry and restaurants in the lower price range. However, ducks are more popular in China and there they are raised extensively.

Domestic Duck Anas platyrhynchos ssp. domesticus 2 .JPG

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Indian runner ducks.
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Thanks to Wikipedia for text and information     https://creativecommons.org/licenses/by-sa/3.0/