Minor update to a Craig Mathews pattern. Tied here as a Flav (the indicator helps me spot this fly in low/flat light conditions when these bugs come out); change color/size to suit your needs.
hook - Dai Riki 135 #14
thread - Danville 6/0 olive
shuck - Congo Hair brown
abdomen - goose biot olive
thorax - dubbing olive
wing - Congo Hair black
indicator - biot hot pink
hackle - partridge olive
mash barb, start thread, tie in CH; wrap halfway down the bend
tie in (moistened) biot notch-side down (for ribbed effect); wrap forward just past the point, tie off/trim
dub thread/dub thorax
tie in a hank of CH in front of thorax, pull fibers back on either side and tie down
tie in biot, fold back and tie down
trim wing/indicator (even with back of thorax)
prep partridge
lay the feather along the hook (adjusted the angle of the fly to help keep the thread from slipping down towards the eye), fibers on either side of the thorax, a bit long; maintaining thread tension (if you don't, the fibers will torque and roll) pull the feather butt forward 'till you get the proper length
trim butt, half hitch x 2, SHHAN
Regards,
Scott