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.
In 4 records from GBIF, adults of this species have been collected during August (50%), October (25%), and June (25%).
In 23 records from GBIF, this species has been collected at elevations ranging from 823 to 6247 ft, with an average (median) of 4429 ft.