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.
Stream photos
In 20 records from GBIF, adults of this species have mostly been collected during April (55%) and May (40%).
In 5 records from GBIF, this species has been collected at elevations ranging from 480 to 3264 ft, with an average (median) of 3084 ft.