Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana

Salmonflies
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

Outlet stream of Upper Titcomb Lake

From Titcomb Basin in Wyoming

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)

Psychodidae True Fly Larva Psychodidae True Fly Larva

Lateral view of a Psychodidae True Fly Larva from Mystery Creek #308 in Washington

This wild-looking little thing completely puzzled me. At first I was thinking beetle or month larva, until I got a look at the pictures on the computer screen. I made a couple of incorrect guesses before entomologist Greg Courtney pointed me in the right direction with Psychodidae. He suggested a possible genus of Thornburghiella, but could not rule out some other members of the tribe Pericomini.

8 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.

Male Ephemerella dorothea dorothea (Pale Evening Dun) Mayfly Dun Pictures

Ruler view of a Male Ephemerella dorothea dorothea (Ephemerellidae) (Pale Evening Dun) Mayfly Dun from Brodhead Creek in Pennsylvania The smallest ruler marks are 1 mm.

Male Ephemerella dorothea dorothea (Ephemerellidae) (Pale Evening Dun) Mayfly Dun from Brodhead Creek in Pennsylvania

Dorsal view of a Male Ephemerella dorothea dorothea (Ephemerellidae) (Pale Evening Dun) Mayfly Dun from Brodhead Creek in Pennsylvania

Ventral view of a Male Ephemerella dorothea dorothea (Ephemerellidae) (Pale Evening Dun) Mayfly Dun from Brodhead Creek in Pennsylvania

Lateral view of a Male Ephemerella dorothea dorothea (Ephemerellidae) (Pale Evening Dun) Mayfly Dun from Brodhead Creek in Pennsylvania

This mayfly was collected from Brodhead Creek in Pennsylvania on May 27th, 2007 and added to Troutnut.com by Troutnut on June 4th, 2007.

Discussions of this Dun

Small Sulphurs

3 replies

Posted by GONZO on Oct 28, 2008

Last reply on Jul 22, 2014 by Entoman

It's been my suspicion for quite some time that a good part of the credit given to dorothea for creating the later, lighter-colored "little sulphur" hatch should probably go to the same species (or species complex) that creates the earlier, larger, darker hatch--E. invaria. Many anglers who fish the small suphurs on valley limestone streams in my home state believe (or have been led to believe) that they are fishing the dorothea hatch. Close inspection of the mayfly that causes the activity usually doesn't bear that out. Most of the true dorothea hatches seem to come from mountainous areas where the streams are faster and have rockier bottoms.

All of the specimens in this section are from PA, and this seems to provide a good case in point. This specimen and the nymph (#766) are good examples of dorothea, and they both came from sections of the Brodheads in the Poconos. The other specimens came from big limestoners and appear to be invaria. Notice that all of the dun and spinner specimens, except for this one, have banded tails (dark markings at the segments). As far as I know, this is not characteristic of the Eastern version of dorothea (E. dorothea dorothea), but it is a trait of invaria.

Start a Discussion of Dun