Cul de canard Cul de canard Cul de canard (CDC) (French for "duck bottom") are the feathers from the back of a duck directly around the preen gland (uropygial gland); they are very buoyant due to preen oil produced by the preen gland. They are used when tying dry flies for fly fishing. They owe their buoyancy to their proximity to the ducks preen gland which secretes an oil distributed by the duck as a cleaning and waterproofing measure. It is unnecessary for the angler to add additional oil by way of floatant. Flies incorporating CDC are easy to dress requiring no floatant
Marius Canard return to the Maghreb, first as a teacher in the "Lycée de Tunis" and then as a professor in the Faculty of Letters of the University of Algiers. It was there that Canard, along with Georges Marçais, founded the "Institut d'Études Orientales" and began a journal that soon acquired international prominence among Orientalists: the "Annales". After 44 years of teaching in Algiers, Canard retired in 1961 to Paris, where he died in 1982. Among Canard's major scholarly achievements are his history of the Hamdanid dynasty, as well as his studies on the Fatimid Caliphate, a field which at the time