Found this on swittersb site; added the partridge just because.
hook - Dai Riki 320 #12
thread - UTC 70 grey brown
tail/abdomen - deer hair
hackle - partridge
collar/head - deer hair dyed dun
Part 1
mash barb/start thread, wrap to bend
clean, stack, measure (gap width past bend) a clump of deer hair; tie in/trim
clean/trim tips on another clump of deer hair; 2 soft loops, increase tension and let it spin
lather, rinse, repeat up the shank to the 80% mark
rough cut (watch those tail fibers)
final cut