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.

Stream photos

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Sweltsa (Sallfly) Stonefly Nymph Sweltsa (Sallfly) Stonefly Nymph

Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington

This species was fairly abundant in a February sample of the upper Yakima.

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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.

Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Definition of 'cubitoanal crossvein'

Cubitoanal crossvein: A short crossvein connecting the cubitus to the anal veins in the vicinity of the anal cell in a stonefly forewing.

These other words reference the same concept: cubitoanal crossveins, cubito-anal crossvein, cubito-anal crossveins.

Hex MayfliesHexagenia limbata

Definition of 'cubitoanal crossvein'

Definition of 'cubitoanal crossvein'

Hex Mayflies
Hexagenia limbata