Anders, here is my tan version of the sparkle pupa I mentioned when you posted your first time olive one previously. I substituted tan UV Ice Dub for the usual veil material.
It was difficult to keep the high sheen (sparkle) of the Ice Dub from blocking off the appearance of the body while taking the photo. This was the best of numerous attempts. I assure you, it looks very much like your posted fly which allows the body to show through.
Keep the veil material sparse to insure that the body is the thing the trout see. The veil is only supposed to represent internal gas bubbles inside the almost ready to emerge insect. This has been many times more effective for me then the usual sparkle pupa designed by LaFontaine.
I make another substitution as well. I use a single strand of pearl crystal flash for the rib.
If you try this one, do try fishing both the standard pattern as you tied it and the Ice Dub version. I'll bet you will be amazed at the difference in strikes. Oh, and don't share this little secret with too many others as we wouldn't want the streams to be devoid of trout. LOL LOL LOL
Thank you for the interesting information, Bill! Your version looks really good, and I will tye some to compare with the standard pattern, and of course let you know how it goes. And, I shall not share the secret with to many. :)
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