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)

Sweltsa (Sallfly) Stonefly Nymph Sweltsa (Sallfly) Stonefly Nymph

Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington

This species was fairly abundant in a February sample of the upper Yakima.

10 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.

Caddisfly Species Psychomyia flavida (Dinky Purple Breasted Sedges)

These small caddisflies are noteworthy because they are widespread and can be extremely abundant, and they are capable of parthenogenesis.

Where & when

Time of year : June through August

Preferred waters: Most abundant in large-river rapids

This species is most abundant in the East and Midwest, but Gary LaFontaine discovered that there are also good populations in Montana. He mentions in Caddisflies that this can be the most abundant species of caddisfly on many rivers.

In 129 records from GBIF, adults of this species have mostly been collected during June (23%), July (22%), August (17%), May (15%), September (7%), and April (5%).

In 90 records from GBIF, this species has been collected at elevations ranging from 20 to 8924 ft, with an average (median) of 3252 ft.