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 with the 16th Chasseurs à cheval Regiment stationed at Beaune, and was decorated with the "Croix de Guerre" with a silver star. After the war, he went to Morocco, where he perfected his knowledge of Arabic. In 1920 he returned to Lyon, where he taught in the "Lycée du Parc". In order to further his language skills, he re-entered the local university's Faculty of Letters to learn Sanskrit. Canard then visited the "École des Langues Orientales" (now known as INALCO) in Paris, where he came to know both William Marçais (1872–1956), and Georges Marçais (1876–1962). The latter convinced Canard to