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 : Mid-May through September
Preferred waters: Rivers and lakes
In 79 records from GBIF, adults of this species have been collected during July (33%), June (29%), August (20%), May (13%), and September (5%).
In 16 records from GBIF, this species has been collected at elevations ranging from 10 to 2776 ft, with an average (median) of 1909 ft.