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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.

Mayfly Genus Nixe

The only species currently in this genus reported to produce fishable hatches is Nixe lucidipennis.

Angling books sometimes mention hatches of Nixe criddlei and Nixe simpliciodes. These species have been moved to the genus Ecdyonurus.

Hatching behavior

These species hatch in or near the surface in calm water. Emergence is quite fast, but the duns may drift a while.

Spinner behavior

Time of day: Dusk

Habitat: Riffles

The female spinners oviposit by flying over the water and dropping down to the surface to release some eggs, then taking off to do it again. They eventually fall spent.

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References

Taxonomy
Species in Nixe
Nixe lucidipennis00
5 species (Nixe horrida, Nixe kennedyi, Nixe perfida, Nixe rusticalis, and Nixe spinosa) aren't included.
Genus Range
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