Rouen duck 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.
Rouen in the since destroyed "tour de lady Pucelle"); the "Church of Saint Ouen" (12th–15th century); the "Palais de Justice", which was once the seat of the "Parlement" (French court of law) of Normandy; the Gothic "Church of St Maclou" (15th century); and the Museum of Fine Arts and Ceramics which contains a splendid collection of faïence and porcelain for which Rouen was renowned during the 16th to 18th centuries. Rouen is also noted for its surviving half-timbered buildings. There are many museums in Rouen: the Musée des Beaux-Arts de Rouen, an art museum with pictures of well-known painters such as