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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Holocentropus Caddisfly Larva Holocentropus Caddisfly Larva

Dorsal view of a Holocentropus (Polycentropodidae) Caddisfly Larva from the Yakima River in Washington

This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.

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 doddsii (Western Green Drake) Mayfly Dun Pictures

I still haven't got my good camera gear set up, but I wanted to get my first Alaskan bug specimen online, so I photographed this one with my point+shoot in the raft.

Female Drunella doddsii (Ephemerellidae) (Western Green Drake) Mayfly Dun from the Gulkana River in Alaska

Lateral view of a Female Drunella doddsii (Ephemerellidae) (Western Green Drake) Mayfly Dun from the Gulkana River in Alaska

Ventral view of a Female Drunella doddsii (Ephemerellidae) (Western Green Drake) Mayfly Dun from the Gulkana River in Alaska

This mayfly was collected from the Gulkana River in Alaska on July 8th, 2007 and added to Troutnut.com by Troutnut on July 19th, 2007.

Discussions of this Dun

Anyone know your western Drunella species?

23 replies

Posted by Troutnut on Jul 19, 2007

Last reply on Apr 12, 2012 by Entoman

Which one is this? It's from a south-central Alaskan river.

great photo's

2 replies

Posted by Pauly on May 26, 2011

Last reply on May 26, 2011 by Troutnut

I would like to thank you for taking the time to photograph and post these beautiful pictures. I'm 64 years old, and an avid fly fisherman. My new hobbie is taking pics of mayflies, and I'm getting excited. I've got a new tripod on order, and an excellent camera. I would find it a pleasure to share my photo's with everyone.

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