Underbody Natural case (Kapok (for a fat body profile))
Body Light olive swannundaze (Goose biot)
Eggs Green or dark brown-green eggs (Spectra dubbing)
Wing Grey polar fibre (4 CDC feathers)
How to tie it
Start light olive thread at the eye, run it back to the bend, and dub a natural kapok underbody along the shank. Kapok is very light and it is there to give a fat sedge profile without adding weight. The fly has to float, not just look right.
Tie in a small ball of green or dark brown-green spectra dubbing right at the bend as the egg sac. This goes on first so everything else builds forward of it.
Tie in a light olive goose biot by the tip in front of the egg sac and wind it forward over the kapok to the 65% mark with the notched edge trailing, so it throws a crisp ridge on each turn.
Biot over kapok is what makes this fly: a hard segmented body over a light, buoyant core, so it looks dense and floats like cork.
Stack four grey CDC feathers and tie them in at the 70% mark as a low tent wing running just past the egg sac, then trim the butts and cover with a few thread turns.
Whip finish a small head. It floats very well and rides fast and very fast water, and it doubles as a swimming adult caddis. Pull it under and swing it and it still fishes.