Rouen duck breast. The female Rouen hens are a consistent shade of mahogany brown, with a brown crown and tan eye-stripes extending from bill to the back of the eyes. Another feature of the female color pattern is the distinct, detailed penciling found on feathers of the head, neck, body, body, most of the wing and tail. Rouen females can be much darker brown than Mallard females. Both sexes also have blue speculum feathers. However, Rouen speculum feathers are brighter in color and larger in size than that of the Mallard. Adult Rouen ducks are typically significantly larger than Mallard ducks. The
History of Rouen the First World War, the British used Rouen as a supply base and there were many military hospitals. Rouen was heavily damaged during World War II – approximately 45% of the city was destroyed. In June 1940, the area between the Rouen Cathedral and the Seine river burned for 48 hours as the Nazis did not allow firemen access to the fire. Other areas were destroyed between March and August 1944, just before and during the Battle of Normandy, which ended on the left bank of the Seine with the destruction of several regiments belonging to the German 7th Army.