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.
This nymph is about an inch long.
This mayfly was collected from Big Brook in Wisconsin on March 9th, 2004 and added to Troutnut.com by Troutnut on January 25th, 2006.