The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
Described by Kondratieff, B.C. & Kirchner, R.F. (1991) New Nearctic Chloroperlidae (Plecoptera). Journal of the New York Entomological Society. Devoted to Entomology in General 99, 199–203.