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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.
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Stonefly Genus Isocapnia (Little Snowflies)

Genus Range

Specimens of the Stonefly Genus Isocapnia

1 Female Adult
1 Nymph

Start a Discussion of Isocapnia

Stonefly Genus Isocapnia (Little Snowflies)

Taxonomy
Species in Isocapnia: Isocapnia hyalita, Isocapnia integra
9 species (Isocapnia abbreviata, Isocapnia agassizi, Isocapnia crinita, Isocapnia fraseri, Isocapnia grandis, Isocapnia missourii, Isocapnia mogila, Isocapnia spenceri, and Isocapnia vedderensis) aren't included.
Genus Range
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