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.

Stream photos

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Female Hydropsyche (Spotted Sedge) Caddisfly Adult Female Hydropsyche (Spotted Sedge) Caddisfly Adult

Lateral view of a Female Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Adult from the Columbia River in Washington

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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.

Dark Blue Sedges

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

Caddisfly Genus Psilotreta

These are often called Dark Blue Sedges.

It pays to learn the quirks of this very abundant and unusual genus. Its hatches stumped Gary LaFontaine for years before he learned their subtleties, prompting him to give the most common species, Psilotreta labida, the nickname "Slap-in-the-Face Caddis."

Male Psilotreta labida (Dark Blue Sedge) Caddisfly Adult

11 Pictures