A couple of useful patterns; both quite generic. A change of size allows you imitate many different upwings emerging and as the dun.

Theses two examples are in the box to imitate Large Dark Olives:

Ascending S-loop Nymph:



Hook: Partridge BIN #16
Thread: Sheer 14/0, tan
Tail and wing: Woodduck
Rib: Hends 0.09 wire, gold
Abdomen: Wapsi Superfine #12 olive
Thorax: Squirrel

Dun:






Hook: Partridge SLD #16
Thread: Sheer 14/0, tan
Tail: Coq de Leon
Abdomen: Wapsi Superfine #12 olive
Thorax: Squirrel
Post: Funky Fibre, grey
Hackle: Barred Dark Ginger

~Dave