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 150 records from GBIF, adults of this genus have mostly been collected during October (43%), September (27%), June (8%), July (7%), August (7%), and November (5%).
In 123 records from GBIF, this genus has been collected at elevations ranging from 30 to 8566 ft, with an average (median) of 1601 ft.