03-10-2008, 01:55 PM
Re: Frogs Fanny flyfloatant??
"C.D.C." or "Cul De Canard", roughtly translated means feathers from a Ducks butt, or more accurately from around the Preening Gland.
Here's a little article by Rene Harrop, who probably uses more cdc than anyone.
Thoughts on CDC
by Rene Harrop
Although I have relied strongly upon feathers from waterfowl since the mid 1950s it is only the past dozen or so years that CDC has existed in my personal fly tying picture. Despite this relatively short period of familiarity these innocent little wisps have installed themselves as my favored material for the delicate and realistic images make necessary by the demanding waters where I fish most frequently.
On the Henry's Fork, which flows nearby, only perfect presentation of a flawless imitation will bring sustained results. CDC, more than any other material, has allowed me to duplicate the appearance, behavior and position of floating or partially submerged insects both aquatic and terrestrial. The fly tying world certainly has become alert to the flotational benefits of CDC. It is my opinion that overdressing an imitative fly is the most common explanation for refusal. Trout on pressured waters easily separate a bulky unrefined imitation from a real insect. amazingly small amounts of CDC will give adequate support on the slow clear currents where selectivity is at it highest.
From the beginning I have treated CDC feathers as though they were hackle tips when winging dry flies or emerging patterns. Two feathers are typically utilized as wings, although one feather will often suffice for extremely small caddis or midge styles. I sort the CDC according to the size of fly I intend to tie, saving the longest feathers for Drakes and other larger imitations. Fibers Stripped from the center stem work nicely for legs, tails and antennae.
Much has been made of CDC's ability to trap air bubbles but I am not certain this feature triggers a positive response from trout. I am convinced, however, that the yielding characteristic of soft CDC fibers promotes subtle movement in the fly. This, I believe, contributes to more lifelike behavior than rigid materials such as deer hair.
The test of any fly is it's ability to convince a fish that it is real. It is my conviction, based upon results, that well designed and properly constructed CDC flies easily hold their own amount the world's most successful patterns. However, despite it's popularity in other countries, CDC has yet to receive full approval here in the U.S.A.. This is likely attributed to unwarranted expectation of something "magical" in the somewhat misunderstood material. No fly possesses the ability to cancel poor casting skills, and a poorly tied pattern will seldom fool an angler wizened trout regardless of it's components.
There are few days when insects are on the water and the trout are rising that I will be found with something other than a CDC fly on my tippet. Such is the confidence I have gained in these remarkable little feathers, and I do not see this changing in the foreseeable future. I do not fool every trout, fly fishing is not like that, but I believe my chances are as good with a CDC fly as with anything. CDC is here to stay and it is only a matter of time until it gains it's just respect.