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.
Time of year : Late April and early May
In 36 records from GBIF, adults of this species have mostly been collected during May (33%), April (31%), March (22%), and August (6%).
In 15 records from GBIF, this species has been collected at elevations ranging from 66 to 19029 ft, with an average (median) of 5367 ft.