Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin

Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

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)

Perlodidae (Springflies and Yellow Stones) Stonefly Nymph Perlodidae (Springflies and Yellow Stones) Stonefly Nymph

Artistic view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington

This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.

11 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 Drunella flavilinea (Flav) Mayfly Dun Pictures

I can't be certain of the ID of this female dun, but I'm calling it Drunella flavilinea for three reasons: 1) the known abundance of "flavs" on the Henry's Fork, 2) clear differences in coloration from my confirmed specimens of Drunella coloradensis, which is the main lookalike, and 3) the habitat (a sizable river in a wide mountain valley, rather than a small, high-altitude stream) suggests it's not coloradensis.

Female Drunella flavilinea (Ephemerellidae) (Flav) Mayfly Dun from the Henry's Fork of the Snake River in Idaho

Dorsal view of a Female Drunella flavilinea (Ephemerellidae) (Flav) Mayfly Dun from the Henry's Fork of the Snake River in Idaho

Lateral view of a Female Drunella flavilinea (Ephemerellidae) (Flav) Mayfly Dun from the Henry's Fork of the Snake River in Idaho

Ventral view of a Female Drunella flavilinea (Ephemerellidae) (Flav) Mayfly Dun from the Henry's Fork of the Snake River in Idaho

I accidentally preserved this one in alcohol before remembering to do the length measurements, so I fished it out of the drink for this photo.

Ruler view of a Female Drunella flavilinea (Ephemerellidae) (Flav) Mayfly Dun from the Henry's Fork of the Snake River in Idaho The smallest ruler marks are 1 mm.

This mayfly was collected from the Henry's Fork of the Snake River in Idaho on July 31st, 2020 and added to Troutnut.com by Troutnut on August 16th, 2020.

Discussions of this Dun

Tying the Flav

1 replies

Posted by Lowell on Mar 8, 2021

Last reply on Mar 11, 2021 by Roguerat

Looking for picture of successful Flav pattern. With materials list and explanation of any critical tying steps. Both dry and nymph.

Lowell

Start a Discussion of Dun