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.
History of Rouen 1485 and influenced its cultural and economic development. Rouen became a regional centre of production by introducing a variety of books to the industry. Although it did not have a university, Rouen became an important intellectual centre by reason of its reputed schools of higher learning. In 1734, a school of surgery was founded (second only to that of Paris, founded in 1724). In 1758 a new hospital was opened, to the west of the town, which replaced the old medieval one which had become too small. During the Franco-Prussian War of 1870-1871, Rouen was occupied by the Prussians. During