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. (1984) A new species of Nemouridae (Plecoptera) from the Great Dismal Swamp, Virginia, USA. Proceedings of the Entomological Society of Washington 86, 578–581.