Tied here as a Callibaetis; change color/size to suit your needs.
hook ? Dai Riki 125 #14
thread - MFC 8/0 sand
tail ? mallard flank
abdomen ? turkey biot callibaetis
loop - UTC 140 grey brown
hackle - grizzly
thorax - dubbing hare's ear
wing - mallard flank
mash barb, start thread at 2/3 mark, wrap to bend
measure (shank length) some mallard flank fibers; tie in/trim
tie in (moistened) biot, notch-side down for ribbed effect; wrap to 2/3 mark, tie off/trim
tie in loop
run mallard flank feather thru the folding machine
measure (shank length); tie in/trim butts