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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.

The Tanana River in Alaska

Stream photos

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Female Hydropsyche (Spotted Sedge) Caddisfly AdultFemale Hydropsyche (Spotted Sedge) Caddisfly Adult
Lateral view of a Female Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Adult from the Columbia River in Washington
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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.
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Caddisfly Species Pycnopsyche lepida (Great Autumn Brown Sedges)

Where & when

This is the most abundant midwestern species of Pycnopsyche. It may share streams with Pycnopsyche guttifer. It can be very abundant.

In 71 records from GBIF, adults of this species have mostly been collected during August (31%), September (28%), July (24%), and October (10%).

In 26 records from GBIF, this species has been collected at elevations ranging from 177 to 9186 ft, with an average (median) of 2822 ft.

Species Range
Map of specific collection sites

Start a Discussion of Pycnopsyche lepida

References

Caddisfly Species Pycnopsyche lepida (Great Autumn Brown Sedges)

Taxonomy
  1. Kingdom Animalia (Animals)
  2. » Phylum Arthropoda (Arthropods)
  3. » Class Insecta (Insects)
  4. » Order Trichoptera (Caddisflies)
  5. » Family Limnephilidae (Giant Sedges)
  6. » Genus Pycnopsyche (Great Autumn Brown Sedges)
  7. » Species lepida (Great Autumn Brown Sedges)
Species Range
Map of specific collection sites
Common Names
Resources
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