Body Arizona Mega Simi Seal, California 420 (dark olive with red/green UV) (as needed)
How to tie it
Slide the metallic olive tungsten bead to the eye and start the thread behind it.
Tie in a chartreuse Chickabou/soft-hackle tail about one shank length at the bend with a few strands of root-beer Krystal Flash.
Spin the California 420 Simi Seal in a dubbing loop and wrap a shaggy, buggy body forward to just behind the bead. Why: the multi-color UV Simi Seal mimics the mottled sheen of a real leech.
Take a turn or two of the chartreuse soft hackle as a collar behind the bead for a hot-spot flash of movement.
Whip finish behind the bead and brush out the dubbing to make it breathe.