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 winter to mid-spring
In 708 records from GBIF, adults of this family have mostly been collected during March (29%), February (24%), January (18%), April (12%), and December (10%).
In 93 records from GBIF, this family has been collected at elevations ranging from 125 to 8648 ft, with an average (median) of 3212 ft.