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 Rouen's cathedral and several significant monuments were damaged by Allied bombing. During the German occupation, Nazi Germany's "Kriegsmarine" had its headquarters located in a château on what is now the Rouen Business School (École Supérieure de Commerce de Rouen). The city was liberated by the Canadians on 30 August 1944 after the breakout from Normandy. History of Rouen Rouen, France, was founded by the Gaulish tribe of Veliocasses, who controlled a large area in the lower Seine valley, which today retains a trace of their name as the Vexin. The Gauls named the settlement "Ratumacos" and the Romans called it