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 March and early April
In 78 records from GBIF, adults of this species have mostly been collected during March (37%), February (28%), April (14%), and January (13%).
In 14 records from GBIF, this species has been collected at elevations ranging from 20 to 2723 ft, with an average (median) of 673 ft.