Wrap 10-12 turns of 0.015 wire on the middle of the shank; dam it in place with red thread front and back, then take the thread to the bend.
Wrap a short, flat red thread tag at the bend (spin the bobbin counterclockwise to flatten the thread).
Pull 8-10 partridge fibers from a small feather and tie in a wispy tail about one hook gap long or a touch less; bind the butts up to the weight.
Catch in small copper wire for the rib and take the thread forward a couple of millimeters.
Snip the brittle tips off two strands of peacock herl and tie them in, wrapping back to the tail.
Hang the thread at mid-body, then wrap both herls forward in touching turns to just in front of the weight. The hanging thread keeps the herls from spreading; tie off and snip.
Counter-wrap the copper rib forward in 4-5 turns to reinforce the herl; tie off tightly, helicopter the wire off, and check for sharp stubs.
Tie in a tiny partridge feather by the tip (fold the tip back and lock it), then wrap 2 turns of hackle, sweeping fibers back as you go.
Secure the hackle, snip the excess, pull the fibers back, and build a hard red thread head.
Whip finish and cement. The red head is the fly's signature hot spot.