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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.

Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington
This species was fairly abundant in a February sample of the upper Yakima.
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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Isoperla quinquepunctata (Little Yellow Stonefly) Stonefly Nymph Pictures

The dorsal patterning is quite unique.

Entoman

This stonefly was collected from the Yuba River in California on March 15th, 2013 and added to Troutnut.com by Entoman on April 20th, 2013.


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Isoperla quinquepunctata (Little Yellow Stonefly) Stonefly Nymph Pictures

Collection details
Location: Yuba River, California
Date: March 15th, 2013
Added to site: April 20th, 2013
Author: Entoman
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