The bright green caddis pupa has been a solid occupant of my fly box since my early days of fly fishing in Pennsylvania and New York. My 01/10/2012 post provides some background information on my introduction to this fly as well as a materials table. The 12/16/2014 post expands on the eastern story and then extends the history to my move to Colorado. I invite you to check them out.
Fast forward to 2017, and I continue to select the bright green caddis during my frequent fishing trips in Colorado and beyond. Over the last two seasons I modified the bright green caddis pupa abdomen by utilizing chartreuse diamond braid instead of a blend of bright green craft yarn and olive sparkle yarn. I like the additional flash provided by the diamond braid. I renamed this fly the go2 sparkle pupa. Old habits die hard; however, and I am reluctant to totally abandon the dubbed body version. I suspect there are situations where the shiny green body might alarm the trout, and they may display a preference for the more subtle bright green dubbed imitation.
My inventory of bright green caddis pupa yielded a total of 41 in my various storage compartments, so I produced four additional flies to increase my stash to 45 for the 2018 season. For some reason I failed to encounter significant caddis activity during the spring in recent years, and consequently the bright green emergent pupa was not in high demand. I hope to change that during the coming season.