Hook TMC 5212 or similar light-wire 2x-long dry/hopper hook (light wire is essential)
Thread Olive (to match body) Fine (minimal wraps)
Materials
Stretch tubing (Hareline) Olive ostrich herl (piece slightly shorter than the shank)
Hen hackle fibers Dark dun hen hackle (small bunch (tail))
Hen/saddle hackle with fine stem Dun/natural hen saddle hackle with fine stem (1 (wonder wing))
Hareline dubbing #29 Olive dun kapok dubbing (small pinch (thorax))
How to tie it
Cut a piece of olive tubing a little shorter than the hook shank, trimming a small angle off both ends.
Put the hook in the vise upside down, wet the tubing, and slide it over the hook point, work it around the bend with a fingernail, and up onto the shank; push it forward over the eye for now.
Turn the hook upright and attach the thread at the rear with as few wraps as possible, two or three forward, back to the start, trim; bulk kills this fly.
Strip several dark-dun hen fibers, even the tips by pinching and pulling them against the grain, and pinch-wrap a tail one shank-length long on top at the rear; trim the butts close.
Slide the tubing back down the shank over the tail butts (the angled cut pins the tail fibers back), then take a few thread wraps forward over the tubing to pinch it and create a segmented body.
Prepare the wonder wing: take a cheap hackle with a narrow stem, keep only the fluffy lower section, trim the fibers down evenly on both sides to the width you'll fold over, and remove the very bottom of the stem, leaving a tie-in point.
Tie the wing in at the midpoint of the shank, fluff pointing rearward, right where the fluffy fibers start; secure and trim the tag.
Dub a slender thorax of olive-dun dubbing in small pinches, starting just behind the eye, working back to the wing tie-in and forward again. Keep it slim.
Fold the wing straight over the top of the thorax to the eye, pull back any stray fibers beyond the eye, secure with two loose wraps then pull the stem snug, tie down, trim, and whip finish.