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.
Preferred waters: Small to mid-sized streams
In 116 records from GBIF, adults of this species have mostly been collected during June (22%), July (21%), August (19%), April (12%), May (11%), and September (11%).
In 56 records from GBIF, this species has been collected at elevations ranging from 41 to 10007 ft, with an average (median) of 4682 ft.
Current speed: Fast
Environmental tolerance: Prefers cold water