Start the black thread behind the eye and run a base back to the bend.
Strip exactly three barred mallard or teal flank barbs (three, not two or four), break them apart a little and bind them in at the bend as a fairly long tail. If they splay askew, leave them.
Take the thread forward, catch in the wire rib and bind it back all the way to the tail.
Dub the fur (fur, not wool) onto the thread and build a tapered body forward, stopping about two eye-lengths behind the eye. Expect two applications; go back over any thin spot to even out lumps.
Wind the rib forward in open turns, using it to squash down any fat spot in the dubbing. Catch it off and helicopter the wire away.
For the beard, take about 20 hackle fibers (no more than 30) and bind them in on top of the shank pointing forward over the eye with a couple of wraps. Check that they reach close to the hook point, add a couple of wraps going back and snip the butts.
Fold the fibers back and down under the shank so they sit as a beard, then lock them there with a few wraps.
Take a left and a right slip of waterfowl quill feather, get the length right and lay them low on top of the body, riding a little down each side rather than upright. Lock them with a couple of wraps and snip the butts off the front.
Build a wet fly head over the butts to bury any fuzz, whip finish and add a drop of head cement, building the head up with the cement if your thread is fine.