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 Marius Canard Marius Canard (26 December 1888 in Dracy-Saint-Loup – September 1982 in Paris) was a French Orientalist and historian. He was born in a small village in the region of Morvan, where his father was a school teacher. Canard studied at the "Collège Bonaparte" in Autun and completed his studies in the Faculty of Letters of the University of Lyon, where he learned the Arabic, Turkish and Persian languages under the guidance of his coeval Gaston Wiet (1887–1971). His first teaching post was as a high school professor at Toulon in 1913. During the First World War, he served