Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York

Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

View from Upper to Lower Titcomb Lake

From Titcomb Basin in Wyoming

Stream photos

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Kogotus Stonefly Nymph Kogotus Stonefly Nymph

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.

8 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...