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)

Skwala (Large Springfly) Stonefly Nymph Skwala (Large Springfly) Stonefly Nymph

Dorsal view of a Skwala (Perlodidae) (Large Springfly) Stonefly Nymph from the Yakima River in Washington

This Skwala nymph still has a couple months left to go before hatching, but it's still a good representative of its species, which was extremely abundant in my sample for a stonefly of this size. It's obvious why the Yakima is known for its Skwala hatch.

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.

Female Ephemerella tibialis (Little Western Dark Hendrickson) Mayfly Dun Pictures

I'm fairly confident calling this dun Ephemerella tibialis because it emerged from one of several similar nymphs in my bucket, which I was able to ID with quite a bit of certainty. However, it looks very different from the other duns I currently have listed, which makes me rethink their IDs.

Ruler view of a Female Ephemerella tibialis (Ephemerellidae) (Little Western Dark Hendrickson) Mayfly Dun from the East Fork Big Lost River in Idaho The smallest ruler marks are 1 mm.

Lateral view of a Female Ephemerella tibialis (Ephemerellidae) (Little Western Dark Hendrickson) Mayfly Dun from the East Fork Big Lost River in Idaho

Female Ephemerella tibialis (Ephemerellidae) (Little Western Dark Hendrickson) Mayfly Dun from the East Fork Big Lost River in Idaho

Dorsal view of a Female Ephemerella tibialis (Ephemerellidae) (Little Western Dark Hendrickson) Mayfly Dun from the East Fork Big Lost River in Idaho

Ventral view of a Female Ephemerella tibialis (Ephemerellidae) (Little Western Dark Hendrickson) Mayfly Dun from the East Fork Big Lost River in Idaho

This mayfly was collected from the East Fork Big Lost River in Idaho on August 3rd, 2020 and added to Troutnut.com by Troutnut on August 18th, 2020.

Start a Discussion of Dun