The CDC feathers are natural feathers are feathers that surround the preen gland on a duck. These feathers are vital to Trout Dry fly tying due to their buoyant properties produced from natural oils in the duck's gland.This feature is especially good for Nymph flies. The feather's high buoyancy from the oils create water-repelling properties which is ideal Shuttlecock flies. Common flies found with CDC feathers include the Yellow Owl Shuttlecock, the F Wing Claret and Duracell Jig CDC T/B.
