Slide a fl. hot orange slotted tungsten bead onto the jig hook (slot forward) and seat it behind the eye. Start thread behind the bead and run to the bend.
Tie in a short strip of micro pine squirrel zonker at the bend so the hair sweeps back one shank-length as the leech tail/wing.
Wrap black (or olive) Krystal Flash or micro chenille forward over the shank to build a thin, slightly flashy body up to about the 70% point.
Tie in 2-3 strands of ostrich herl just behind the bead and take 2-3 turns to form a soft, breathing collar; stroke it back and tie off.
Build a small thread collar behind the bead, whip finish and cement. The hot bead rides as the head and jigs the fly up-and-down.
For the olive version, use olive thread, olive squirrel, olive body and olive ostrich throughout.