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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

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.

27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Caddisfly Species Rhyacophila fuscula (Green Sedges)

This is the most abundant species of Rhyacophila in much of the East, and every stage can be important to trout. The drifting larvae are important in early Spring, and the emergers and egg-laying adults become important in late Spring and early Summer.

Where & when

Time of year : Mid-May to June

In 80 records from GBIF, adults of this species have mostly been collected during June (29%), July (29%), August (16%), May (15%), and September (6%).

In 51 records from GBIF, this species has been collected at elevations ranging from 85 to 4921 ft, with an average (median) of 1901 ft.

Species Range

Specimens of the Caddisfly Species Rhyacophila fuscula

2 Larvae

Start a Discussion of Rhyacophila fuscula

References

Caddisfly Species Rhyacophila fuscula (Green Sedges)

Taxonomy
Species Range
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