Ice Dub or peacock herl (thorax) Black peacock ice dub (1 pinch/2 strands)
How to tie it
Start burgundy thread behind the eye and run it back to the bend.
Tie in a small bunch of pheasant-tail fibres so the tips extend about a shank-length off the bend for the tail, leaving the butts long to form the body.
Tie in a strand of fine copper wire at the tail base for the rib.
Wind the pheasant-tail butts forward in touching turns to about two-thirds of the shank to form a slim tapered abdomen, and tie off.
Counter-rib the abdomen forward with the copper wire in evenly spaced turns and tie off; helicopter to break the wire.
At the front of the abdomen, tie in a short sparse tuft of UV pearl dubbing / dubbing enhancer so it sits back against the abdomen simulating gills (the pattern's key trigger).
Dub or wrap a black-peacock Ice Dub (or peacock herl) thorax up to just behind the eye.
Whip finish behind the eye and cement the burgundy head.