Another stone fly simulation. Hank's Hackle Flapper, an Oregon, Deschutes River tie from back in the day. Found in an early spring 1984 in an issue of Salmon Trout Steelheader magazine from Hank Botlemeyer. How the fly was originated:

Hank was fishing the Stone Fly hatch on Oregon's Deschutes River using a size 4 Caddis Bucktail with no success. Suddenly the Caddis Buck produced a nice Deschutes redside and then another. After the second fish was landed Hank inspected the fly and found the hackles had come loose and were flapping about. Well as I remember the story Hank retired the messed up but effective Caddis Buck to be duplicated later. Hank wasn't a fly tier so he took the messed up Caddis Buck to a tier whose name escapes me and the fly pictured here is the result.