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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 Skwala (Perlodidae) (Large Springfly) Stonefly Nymph from the Yakima River in Washington
This Skwala nymph still has a couple months left to go before hatching, but it's still a good representative of its species, which was extremely abundant in my sample for a stonefly of this size. It's obvious why the Yakima is known for its Skwala hatch.
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 Tricorythodes (Trico) Mayfly Spinner Pictures

Ventral view of a Male Tricorythodes (Leptohyphidae) (Trico) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
Lateral view of a Male Tricorythodes (Leptohyphidae) (Trico) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
Every ruler mark is 1/16 inch.

Ruler view of a Male Tricorythodes (Leptohyphidae) (Trico) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho The smallest ruler marks are 1/16".

This mayfly was collected from the Henry's Fork of the Snake River in Idaho on August 11th, 2018 and added to Troutnut.com by Troutnut on June 12th, 2019.


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Male Tricorythodes (Trico) Mayfly Spinner Pictures

Collection details
Location: Henry's Fork of the Snake River, Idaho
Date: August 11th, 2018
Added to site: June 12th, 2019
Author: Troutnut
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