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.

My then-girlfriend, now-wife took this picture with my camera.

From Toughannock Creek in New York

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)

Isoperla (Stripetails and Yellow Stones) Stonefly Adult Isoperla (Stripetails and Yellow Stones) Stonefly Adult

Dorsal view of a Isoperla (Perlodidae) (Stripetails and Yellow Stones) Stonefly Adult from Mystery Creek #308 in Washington

9 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.

Female Callibaetis ferrugineus (Speckled Dun) Mayfly Dun Pictures

This is one of four specimens I photographed together from the same hatch, also including a nymph, a male dun, and a male spinner.

Ruler view of a Female Callibaetis ferrugineus (Baetidae) (Speckled Dun) Mayfly Dun from Mystery Creek #304 in Idaho The smallest ruler marks are 1 mm.

Dorsal view of a Female Callibaetis ferrugineus (Baetidae) (Speckled Dun) Mayfly Dun from Mystery Creek #304 in Idaho

Ventral view of a Female Callibaetis ferrugineus (Baetidae) (Speckled Dun) Mayfly Dun from Mystery Creek #304 in Idaho

This mayfly was collected from Mystery Creek #304 in Idaho on July 23rd, 2022 and added to Troutnut.com by Troutnut on January 15th, 2023.

Start a Discussion of Dun