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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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Male Stenonema terminatum Mayfly Spinner Pictures

Lateral view of a Male Stenonema terminatum (Heptageniidae) Mayfly Spinner from the Teal River in Wisconsin
Male Stenonema terminatum (Heptageniidae) Mayfly Spinner from the Teal River in Wisconsin
Male Stenonema terminatum (Heptageniidae) Mayfly Spinner from the Teal River in Wisconsin
Male Stenonema terminatum (Heptageniidae) Mayfly Spinner from the Teal River in Wisconsin
Male Stenonema terminatum (Heptageniidae) Mayfly Spinner from the Teal River in Wisconsin
Ruler view of a Male Stenonema terminatum (Heptageniidae) Mayfly Spinner from the Teal River in Wisconsin The smallest ruler marks are 1 mm.
Dorsal view of a Male Stenonema terminatum (Heptageniidae) Mayfly Spinner from the Teal River in Wisconsin
Male Stenonema terminatum (Heptageniidae) Mayfly Spinner from the Teal River in Wisconsin
Male Stenonema terminatum (Heptageniidae) Mayfly Spinner from the Teal River in Wisconsin

This mayfly was collected from the Teal River in Wisconsin on June 8th, 2021 and added to Troutnut.com by Troutnut on June 9th, 2021.


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Male Stenonema terminatum Mayfly Spinner Pictures

Collection details
Location: Teal River, Wisconsin
Date: June 8th, 2021
Added to site: June 9th, 2021
Author: Troutnut
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