Here's a 1st shot at a Green Drake Wulff. Didn't have any dun calf-tail or green-dyed grizzly hackle, so I fudged stuff a bit. A bit rough, need to tie a few more to get it right.
hook - Tiemco 5212 #10
thread - UTC 140 olive/brown
tail - moose body
wing - deer hair dun
body - rabbit olive
rib - 1 strand embroidery floss yellow
hackle - olive and grizzly mixed
Part 1
mash barb and start thread at 75% mark
cut a good sized clump of deer hair; clean, stack and measure for length (hook shank); I don't usually start at the wing, but with deer hair,calf tail, etc it leaves a big bump at tie-in; it's easier to tie the tail in afterwards and create a smooth body
place hair on top of shank; 2 soft loops on top of each other
pull bobbin firmly towards you allowing hair to flair (but not spin); take a few more very firm wraps, pull butts up and cut at an angle
add a drop of Crazy glue to the stub and apply more thread wraps to anchor and smooth, then move in front of hair, pull up and apply thread dam to set wing upright
divide hair to create 2 even clumps
take 3 wrap between clumps, front to back
then 3 wraps back to front
wrap around base of near wing clump
3 or 4 more firm wraps to create "post"