Those red phase Ruff Grouse tails are hard to get. I’d be willing to pay for a tail or two!!
An almost long forgotten Colorado fly pattern called the “ Breadcrust” ! You split the vein of the tail feather, and wrap the hook! Perfect imitation of a cased Caddis! Killer pattern!
I have about a dozen cherished tied right now, maybe two feathers left, then my stash is gone.