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 141 records from GBIF, adults of this species have mostly been collected during September (18%), August (15%), October (15%), July (13%), May (12%), and June (11%).
In 12 records from GBIF, this species has been collected at elevations ranging from 246 to 1083 ft, with an average (median) of 620 ft.