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.

The trees were leafing out and the trout were rising on this productive Wisconsin stream

From the Namekagon River in Wisconsin

Stream photos

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Coleoptera (Beetle) Insect Larva Coleoptera (Beetle) Insect Larva

Lateral view of a Coleoptera (Beetle) Insect Larva from Sears Creek in Washington

6 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.

Boreal Willowflies

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

Stonefly Species Taeniopteryx nivalis

These are sometimes called Boreal Willowflies.

Taeniopteryx nivalis (Early Black Stonefly) Stonefly Nymph

2 Pictures

Dorsal view of a Taeniopteryx nivalis (Taeniopterygidae) (Early Black Stonefly) Stonefly Nymph from unknown in Wisconsin

I found this nymph wriggling in the surface film during a hatch of related Strophopteryx adults. This nymph died in transport so it's not alive in the photos, but it's pretty close to its live colors.

Collected March 17, 2004 from unknown in Wisconsin

Added by Troutnut on January 25, 2006

Collected March 17, 2004 from unknown in Wisconsin and added by Troutnut on January 25, 2006