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.

Stream photos

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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.

Pink Cahills

Like most common names,"Pink Cahill" can refer to more than one taxon. They're previewed below, along with 6 specimens. For more detail click through to the scientific names.

Mayfly Genus Stenacron

These are very rarely called Pink Cahills.

The species in this genus were formerly classified in Stenonema. See the genus Maccaffertium for details. Only one species, Stenacron interpunctatum, is important to fly fishermen. See its page for details.

Male Stenacron (Light Cahill) Mayfly Dun

13 Pictures

Artistic view of a Male Stenacron (Heptageniidae) (Light Cahill) Mayfly Dun from the Teal River in Wisconsin

Collected May 26, 2005 from the Teal River in Wisconsin

Added by Troutnut on May 22, 2006

Collected May 26, 2005 from the Teal River in Wisconsin and added by Troutnut on May 22, 2006

Male Stenacron interpunctatum (Light Cahill) Mayfly Spinner

8 Pictures

Lateral view of a Male Stenacron interpunctatum (Heptageniidae) (Light Cahill) Mayfly Spinner from the Namekagon River in Wisconsin

Collected June 9, 2005 from the Namekagon River in Wisconsin

Added by Troutnut on May 26, 2006

Collected June 9, 2005 from the Namekagon River in Wisconsin and added by Troutnut on May 26, 2006

Stenacron (Light Cahill) Mayfly Nymph

2 Pictures

Stenacron (Heptageniidae) (Light Cahill) Mayfly Nymph from unknown in Wisconsin

Collected August 7, 2004 from unknown in Wisconsin

Added by Troutnut on January 18, 2006

Collected August 7, 2004 from unknown in Wisconsin and added by Troutnut on January 18, 2006

See 5 more specimens...

Mayfly Species Epeorus vitreus

These are very rarely called Pink Cahills.

This is the second most common Epeorus species in the East and Midwest. Most anglers will encounter sporadic hatches of Epeorus vitreus once in a while, and sometimes a more concentrated emergence causes a good rise of fish.

Male Epeorus vitreus (Sulphur) Mayfly Dun

4 Pictures

Male Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Dun from the Beaverkill River in New York

This is my favorite mayfly from 2004, and it appears on my popular Be the Trout: Eat Mayflies products. Check them out!

Its identification is really up in the air. It might be a late-season vitreus dun but it may very well be one of the more obscure species in that genus.

Collected September 1, 2004 from the Beaverkill River in New York

Added by Troutnut on January 25, 2006

Collected September 1, 2004 from the Beaverkill River in New York and added by Troutnut on January 25, 2006

Female Epeorus vitreus (Sulphur) Mayfly Spinner

8 Pictures