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 was otherwise the almost exclusive reserve of Vladimir Alexeyevich Ivanov (1886–1970). He also made important contributions on the history of Muslim relations with the Byzantine Empire, and along with the Belgian Henri Grégoire (1881–1964) supervised the French edition of Alexander Vasiliev's (1867–1953) monumental "Byzantium and the Arabs" (Византия и арабы). 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