Bead Slotted (drop) tungsten bead on the balance pin - 2.5mm (yellow-dot) or 3.0mm (red-dot) (1)
Balance pin Sequin/beading pin (1)
Tail/body Black marabou, wispy (1-2 pinches)
Flash (optional) Pearl or holographic Krystal Flash (2-3 strands)
Collar Black marabou or soft black dubbing (small pinch)
How to tie it
Slide the tungsten bead onto the balance pin and lash the pin along the top of the shank so the bead extends just past the hook eye; trim the excess pin. This balances the fly horizontal.
Run thread to the bend and tie in a wispy black marabou tail about one shank length, plus a couple of strands of pearl Krystal Flash if desired.
Wrap the remaining marabou (or a marabou dubbing loop) forward as a thin, wispy body to behind the bead.
Add a soft black marabou or dubbing collar behind the bead, whip finish.