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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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Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Delaware River in New York
Earlfishman
Posts: 17
Earlfishman on May 19, 2007May 19th, 2007, 7:49 am EDT
Jason,

This one looks more like a Chloroperlidae than Capniid. Take a look at the glossae and paraglossae, the length of the cerci, and the wingpads. It's probably Sweltsa sp. based on the hairy chest/shoulders/armpits and the hairs on the cerci.

Earl

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