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
Antisemitic canard virtually no role in the slave-trading of Britain or France. The Nation of Islam published "The Secret Relationship Between Blacks and Jews" in 1991, which asserted that Jews played a major role in the Atlantic slave trade. The book was widely criticized as anti-Semitic and led to additional scholarly research on the subject, including books such as "Jews and the American Slave Trade" by Saul S. Friedman, which concluded that Jewish involvement in the slave trade was "minimal" and comparable to other groups of slave-traders such as the English, and the accusations were an Antisemitic canard. In 1995 the American