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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.

Artistic view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.
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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Stonefly Species Clioperla clio (Clio Stripetail)

Where & when

In 56 records from GBIF, adults of this species have mostly been collected during April (39%), March (21%), May (21%), February (9%), and June (7%).

In 4 records from GBIF, this species has been collected at elevations of 480, 2690, 2723, and 2756 ft.

Species Range

Specimens of the Stonefly Species Clioperla clio

1 Female Adult

Start a Discussion of Clioperla clio

Stonefly Species Clioperla clio (Clio Stripetail)

Taxonomy
Species Range
Common Name
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