Hook 1X long dry fly hook, #8-12 (tied here in #12; workable down to #16)
Thread Black 70 denier
Materials
Bronze mallard flank Bronze mallard (One good chunk for the upright wing, about four barbs for the tail, a slightly larger bunch for the down wing)
Muskrat fur Gray superfine dubbing (Underfur only, enough for a slim body)
Dry fly hackle Grizzly hackle (One feather)
Dry fly hackle Brown hackle (One feather, a size smaller than the grizzly)
How to tie it
Lay a thread base and leave the thread hanging at the one-third point. The upright wing goes on first.
Pull a fair-sized chunk of bronze mallard flank off the stem perpendicular to it, measure it so it will stand about as tall as the finished hackle, and tie it in at the one-third point with a couple of wraps.
Lift the butts to 45 degrees, cut them off with the scissors parallel to the shank for a taper, and bind them down; then build a thread dam right behind the wing to stand it up.
Split the wing as close to half and half as you can and set it with two X-wraps.
Take the thread to the bend and tie in about four bronze mallard barbs as a short tail, roughly one hook gap long, rolling them between your fingers first to keep them together. Trim and even out the underbody with a few wraps.
Wax the thread, spin a thin muskrat underfur noodle (guard hairs pulled out) and start the dubbing right at the bend by timing the first bare thread wraps to land there; wrap a smooth body forward to the back of the wing without building much of a thorax.
Tie in a slightly larger bunch of bronze mallard as a down wing, sloping back to about the end of the tail, with a pinch wrap and then a couple of securing wraps; trim the butts carefully without cutting the upright wings.
Tie in the grizzly hackle and the smaller brown hackle together behind the wing, wrap them as a pair (two or three turns behind the wing, four in front) tie off and trim.
Build a small head, pull any forward-pointing fibers back, snip the strays and whip finish (two whip finishes if you are not cementing). Trim the excess hackle tips last.