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Rouen duck
The Rouen is a heavyweight breed of domesticated duck raised primarily for decoration or as general purpose ducks, since they are not prolific egg layers. The breed originated in France sometime before the 19th century.
==Description==
The plumage coloring of both the Rouen drake and the Rouen hen are nearly identical to that of the Mallard drake and Mallard hen: males have green heads, white collars, black tail feathers, a gray body, and a deep claret breast. The female Rouen hens are mottled light and dark brown, with a black crown and eye-stripes. Rouen hens can be much darker brown than Mallard hens. Both sexes also have blue speculum feathers. However, Rouen speculum feathers are brighter in color and larger in size than that of the Mallard. Adult Rouen ducks are typically significantly larger than Mallard ducks. The Rouen duckling is identical to the Mallard duckling in terms of plumage coloring. In North America, two distinct types are bred: the common, or production-bred, variety that is larger than a Mallard but has a typical duck conformation, and the much larger and squarer standard-bred variety. The production variety normally weighs 6–8 lbs (2.7–3.6 kg) while the standard-bred weighs 9–12 lb (4.1–5.4 kg).
Rouen ducklings can be distinguished from wild mallard ducklings by the presence of a second stripe which runs across their face, just under their eye, whereas mallard ducklings have only one stripe which runs across their eye.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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