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
Canard-Duchêne Revolution, Canard-Duchêne still managed to appeal to the citizens of France who abhorred any symbols of aristocracy. This was probably because Canard-Duchêne never had large profit-margins, unlike other houses such as Laurent-Perrier, and Moët & Chandon. It was also due to the lucky fact that Napoleon loved drinking Champagne. Indeed, it was just after the French Revolution that the art of sabrage (opening a Champagne bottle with a sword) was invented and developed. Canard-Duchêne has always been well-associated with this noble yet fun art form and holds tournaments where sommelier compete in the art of sabrage. In 1890, Victor and