Place a ground wrap up to the hook bend and tie in a few (3-5) fibers of a CDL feather as a tail. Tie down over the entire length of the hook shank to obtain a uniform body.
Tie in a piece of nylon over the whole hook shank. Pick it up with a clip and wind it tightly forward. There should be room for 3-5 turns with the hackle. Form the body accordingly. Tie off the nylon tightly.
Tie in the hackle, make 3-5 tight turns and tie off the hackle.
Finish the fly with the Whip Finisher and varnish the head.
Tying thread: 8/0, of your choice - here orange
Hook: Dry fly hook, #12 - 22
Tail: Coque de Leon CDL, dark pardo
Body: Nylon, yellow/black
Hackle: Cock, color of your choice - here grizzly