Minimum materials, maximum loops; I’m guessing a caddis of some sort. Original calls for white-tipped goose for the wings; got none of that but did find some mallard that provides a similar effect (he does mention that all grey works fine, too).
I will be sure to tye some small versions for my local trout.
But what is even more interesting is that I live in the Sherbrooke region , is there a particular reason that you reference Sherbrooke, and use the french name?
Do you have the history of the fly? or is it your creation ?
If it indeed came from Quebec, do you know which rivers it was fished on in the Sherbrooke region?
The creator is Belgian tyer Geert Webrouk; he uses the alias geraldsherbrook on a number of forums. Not sure of the origin of the pattern; it may just be the product of a very talented and creative mind.