Trout expend less energy taking an insect trapped in the surface than a hatched adult that might fly off at any moment. Hence their attraction to this Fussy Dun emerger, the perfect imitation of a large dark olive (LDO). The bedraggled nature of the fly mimics duns that have been blown over or are struggling to free themselves of the surface tension - a time at which they are most vulnerable. If you find it difficult to tie with delicate CDC, try a normal parachute hackle using brown cock.

Fussy Dun

Fussy Dun

Hook: Size 10-12 Partridge Caddis Emerger Thread: Yellow Semperfli Nano 12/0  
Rib: Olive-brown Danville’s 6/0 Flymaster Body: Veniard Australian opossum dubbing  Thorax: Grey squirrel dubbing  Wing: Black or fluorescent yellow TMC Aero Dry Wing  Hackle: CDC in dubbing loop