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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In the Mayfly Genus Tricorythodes by Bwoklink (Martinlf replied)

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Limnephilus (Summer Flier Sedge) Caddisfly Larva Limnephilus (Summer Flier Sedge) Caddisfly Larva

Case view of a Limnephilus (Limnephilidae) (Summer Flier Sedge) Caddisfly Larva from the Yakima River in Washington

This seems to be a young larva of Limnephilus. Although not clear in the picture, several ventral abdominal segments have chloride epithelia.

7 Recently Added Photos

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.

Western Light Cahills

This common name refers to only one genus. Click its scientific name to learn more.

Mayfly Genus Cinygma

These are often called Western Light Cahills.

This uncommon Western genus is closely related to Cinygmula. It rarely provides good hatches.

Male Cinygma dimicki (Western Light Cahill) Mayfly Spinner

8 Pictures

Lateral view of a Male Cinygma dimicki (Heptageniidae) (Western Light Cahill) Mayfly Spinner from the Cedar River in Washington

I found a couple small (one or two dozen flies) clouds of these male spinners dancing low over the riffly parts of a pool in this fast river draining out of the Cascades.

Collected June 29, 2021 from the Cedar River in Washington

Added by Troutnut on July 2, 2021

Collected June 29, 2021 from the Cedar River in Washington and added by Troutnut on July 2, 2021

Cinygma (Western Light Cahill) Mayfly Nymph

2 Pictures

Cinygma (Heptageniidae) (Western Light Cahill) Mayfly Nymph from Swamp Creek in Oregon

Collected July 13, 2011 from Swamp Creek in Oregon

Added by Bnewell on July 14, 2011

Collected July 13, 2011 from Swamp Creek in Oregon and added by Bnewell on July 14, 2011

See 2 more specimens...