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 51 records from GBIF, adults of this species have mostly been collected during September (31%), August (27%), July (16%), October (14%), and June (8%).
In 35 records from GBIF, this species has been collected at elevations ranging from 194 to 9751 ft, with an average (median) of 479 ft.
Time of day: Afternoon
Current speed: Moderate
Most physical descriptions on Troutnut are direct or slightly edited quotes from the original scientific sources describing or updating the species, although there may be errors in copying them to this website. Such descriptions aren't always definitive, because species often turn out to be more variable than the original describers observed. In some cases, only a single specimen was described! However, they are useful starting points.
This is a handsome, clear-winged, rich brownish, late-season species. Head above, thorax, and both ends of abdomen deep rich brown. Legs pale. Wings hyaline with pale veins. Costal cross veins obsolete except in the stigmatic area where they are numerous, simple, curved, and strongly aslant, and where the proximal end (next to subcosta) of each is obsolescent.
Abdomen white on segments 2 to 7, with brownish purple half-rings across the apices of the segments. A brown point on the spiracle, and a rounded brown spot before each spiracle above the lateral margin. Ganglia marked with yellow. Forceps with a large, ventral, basal lobe-like dilation. Penes separated by a U-shaped notch; each dilated at its outer end, narrowing the notch. On the outer side at the end there is a recurved lateral tooth. The reflexed spur is twice as long as the cleft is deep; it is arcuate, outcurving and acute at the apex (see fig. 134). Tails white.
This is a common species in the northeastern states.