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.
Stream photos
In 20 records from GBIF, adults of this family have been collected during August (35%), September (30%), July (20%), and October (15%).
In 16 records from GBIF, this family has been collected at elevations ranging from 72 to 2070 ft, with an average (median) of 919 ft.