I would like to know if you know anyone who ties what I call my bi-color PMD Sparkle Dun?

It seems logical that if you are tying an emergent or momentarily crippled dun, it would have a trailing shuck and a bit of remaining shuck on the abdomen.

I mentioned this pattern to Craig Mathews of Blue Ribbon flies. He said they have been tying a similar pattern for years, although I have personally never seen any before.

Would appreciate information on this.