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 Under the reorganization of Diocletian, Rouen was the chief city of the divided province Gallia Lugdunensis II and reached the apogee of its Roman development, with an amphitheatre and "thermae" of which foundations remain. In the 5th century, it became the seat of a bishopric and later a capital of Merovingian Neustria. From their first incursion into the lower valley of the Seine in 841, the Normans overran Rouen. From 912, Rouen was the capital of the Duchy of Normandy and residence of the local dukes, until William the Conqueror moved his residence to Caen. In 1150, Rouen received its