Plan to try this in smaller sizes for the western Green Drake and Flav hatches.

hook - Mustad 3906 #8
thread - Danville 6/0 light olive
tag - tinsel opal
rib - small wire chartreuse
tail - chatreuse hackle/bronze mallard
body hackle - olive
body - dubbing olive
front hackle - chartreuse
cloak - bronze mallard
collar - partridge dyed golden olive (1 Tbs Rit golden yellow/1 cup water overdyed with 1 Tbs Rit Golden yellow, 1 tsp Rit dark green/1 cup water)
head - Mirage Flashabou opal