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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.

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.
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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Kogotus Stonefly Nymph Pictures

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.

Dorsal view of a Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington
Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington
Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington
Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington
Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington
Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington
Ruler view of a Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington The smallest ruler marks are 1 mm.
Ventral view of a Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington

This stonefly was collected from Mystery Creek #199 in Washington on June 19th, 2023 and added to Troutnut.com by Troutnut on June 21st, 2023.


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Kogotus Stonefly Nymph Pictures

Collection details
Location: Mystery Creek #199, Washington
Date: June 19th, 2023
Added to site: June 21st, 2023
Author: Troutnut
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