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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 Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington
This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.
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 Ephemerella dorothea infrequens (Pale Morning Dun) Mayfly Spinner Pictures

This spinner was collected in proximity to this dun and this other dun, so one of them is likely the same species. Note for ID purposes that this one is missing one of its cerci.

Lateral view of a Male Ephemerella dorothea infrequens (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from the Madison River in Montana
Dorsal view of a Male Ephemerella dorothea infrequens (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from the Madison River in Montana
Male Ephemerella dorothea infrequens (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from the Madison River in Montana
Ruler view of a Male Ephemerella dorothea infrequens (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from the Madison River in Montana The smallest ruler marks are 1 mm.
Ventral view of a Male Ephemerella dorothea infrequens (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from the Madison River in Montana
Male Ephemerella dorothea infrequens (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from the Madison River in Montana

This mayfly was collected from the Madison River in Montana on July 1st, 2019 and added to Troutnut.com by Troutnut on July 18th, 2019.


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Male Ephemerella dorothea infrequens (Pale Morning Dun) Mayfly Spinner Pictures

Collection details
Location: Madison River, Montana
Date: July 1st, 2019
Added to site: July 18th, 2019
Author: Troutnut
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