CDC Particular (Spent)

Hook: Standard dry-fly hook, size to
    match the natural insect.
Thread: Black 8/0 (70 denier) or 6/0
    (140 denier).
Tail: Reddish brown hackle fibers.
Body: Brown hackle quill.
Wings: Gray cul de canard shaped in
    a wing burner.
Hackle and thorax: Brown cul de canard.