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.
I caught this specimen two days' walk from my macro lenses, but I don't think I have a dun of this species yet, so I took the best photos I could with my iPhone.
This mayfly was collected from Island Lake in Wyoming on August 30th, 2020 and added to Troutnut.com by Troutnut on September 18th, 2020.