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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 Amphizoa (Amphizoidae) Beetle Larva from Sears Creek in Washington
This is the first of it's family I've seen, collected from a tiny, fishless stream in the Cascades. The three species of this genus all live in the Northwest and are predators that primarily eat stonefly nymphs Merritt R.W., Cummins, K.W., and Berg, M.B. (2019).
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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Claassenia sabulosa (Golden Stone) Stonefly Nymph Pictures

This is a stonefly that has recently molted and has not yet darkened.

This stonefly was collected from the Jocko River in Montana on May 14th, 2005 and added to Troutnut.com by Bnewell on June 28th, 2011.


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Claassenia sabulosa (Golden Stone) Stonefly Nymph Pictures

Collection details
Location: Jocko River, Montana
Date: May 14th, 2005
Added to site: June 28th, 2011
Author: Bnewell
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