Even though I?ll never be able to tie a proper Sparkle Dun, these work well enough and I don?t have to worry about about the wing torquing around the shank, no matter how firmly I think I?ve wrapped it; plus, these have built-in PFDs.

hook - WFC Model 4 #10
thread - Danville 6/0 light olive
shuck - Congo Hair brown
rib - Flatwax nylon chartreuse
body/head - dubbing olive
thorax/wing - deer hair dyed olive

Regards,
Scott