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

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)

Female Skwala (Large Springfly) Stonefly Adult Female Skwala (Large Springfly) Stonefly Adult

Lateral view of a Female Skwala (Perlodidae) (Large Springfly) 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.

Now that's aBWO!!

Female Ephemerella excrucians (Pale Morning Dun) Mayfly Spinner

11 Pictures

Lateral view of a Female Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Spinner from the Bois Brule River in Wisconsin

Collected June 30, 2005 from the Bois Brule River in Wisconsin

Added by Troutnut on April 22, 2006

Collected June 30, 2005 from the Bois Brule River in Wisconsin and added by Troutnut on April 22, 2006

Adirman

Monticello, NY

Posts: 479

Adirman on Sep 10, 2010September 10th, 2010, 3:15 am EDT

That Attenuata looks like it truly has the olive body, more so than any BWO pic i've seen yet! Wah tsize would that be tied in to imitate?

Thanks,

Adirman

GONZO
Site Editor
"Bear Swamp," PA

Posts: 1681

GONZO on Sep 10, 2010September 10th, 2010, 4:31 am EDT

A-man,

The size of A. attenuata is usually around 6-7mm (or somewhere around a #16-18). However, this species is also notorious for creating confusion in fly-fishing literature and getting credit for being a more significant hatch than it probably is. I have some doubts that any of the mayflies pictured in the A. attenuata section are actually that species.

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Sep 10, 2010September 10th, 2010, 4:36 am EDT

Adirman-

The male dun and spinner would have a body length of ~6mm, which would translate to hook size #18, and the female would be slightly longer.

EDIT:

Lloyd,

Oh shoot, we've done it again.

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com