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 (the site of Joan of Arc's pyre) is the modern church of St Joan of Arc. This is a large, modern structure which dominates the square. The form of the building represents an upturned viking boat and a fish shape. Rouen was also home to the French Grand Prix, hosting the race at the nearby Rouen-Les-Essarts track sporadically between 1952 and 1968. In 1999 Rouen authorities demolished the grandstands and other remnants of Rouen's racing past. Today, little remains beyond the public roads that formed the circuit. Rouen has an oceanic climate ("Cfb" in the Koeppen climate classification). Mainline trains