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

Featured on the forum

Re: Trico emergers
In the Mayfly Genus Tricorythodes by Bwoklink (Martinlf replied)

Re: Trico Tips
In the Mayfly Genus Tricorythodes by Martinlf

Re: UV spectrum and trout
In General Discussion by Martinlf

Re: closing the gender gap in flyfishing
In General Discussion by Konchu (Smallflyguy replied)

Re: Fishing Kupa River, Slovenia
In Fishing Reports by Slocum (Fish1 replied)

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.

Updates from July 30, 2004

Photos by Troutnut

This is the smooth tailout of a large, wide flat into a very steep riffle. Fish rise here almost every evening, but it's a difficult place to fool them, with clear water and tricky currents.

This beautiful habitat held some big risers that were too wary for me on one late July morning.

All along this fertile river, cedar sweepers like these shelter small brookies, browns, and rainbows.

A remote, lake-like stretch of a trout river provides refuge for large, reclusive browns.

Closeup insects by Troutnut from the Bois Brule River and Miscellaneous Wisconsin in Wisconsin

Polydrusus (Weevil) Beetle Adult

3 Pictures

Artistic view of a Polydrusus (Curculionidae) (Weevil) Beetle Adult from the Bois Brule River in Wisconsin

This is an iridescent green terrestrial beetle. They're common in northern Wisconsin's forests during the middle of summer, and I found them on the water's surface more than any other terrestrial insect. I saw the trout take a few and caught some trout on an imitation.

Collected July 30, 2004 from the Bois Brule River in Wisconsin

Added by Troutnut on January 25, 2006

Collected July 30, 2004 from the Bois Brule River in Wisconsin and added by Troutnut on January 25, 2006

Female Stenacron (Light Cahill) Mayfly Dun

3 Pictures