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

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

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.
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.

Hydrophilidae (Giant Water Scavenger Beetle) Beetle Adult Pictures

This is a water beetle. It is the hardest object in the world to pick up with tweezers. The second hardest is Mount Everest.

This beetle was collected from the Namekagon River in Wisconsin on January 13th, 2004 and added to Troutnut.com by Troutnut on January 25th, 2006.

Discussions of this Adult

Giant Water Scavenger Beetle
2 replies
Posted by GONZO on Oct 14, 2006
Last reply on Nov 27, 2006 by GONZO
I'm not great on beetle identification, but this one seems pretty easy--Hydrophilus triangularis.
Beetle ID
1 replies
Posted by DMM on Nov 18, 2006
Last reply on Nov 20, 2006 by Troutnut
Beetles can be very tricky to identify. It has been my experience that it is extremely difficult to identify many insects to the species level based on pictures alone. It may not be able to be positively identified to genus either. The family is probably correct though, except the family isn't listed here. The family should be Hydrophilidae. Hydrophiloidea is a superfamily designation. Having said that, GONZO's ID could be correct (and if he has the experience, probably is), it's just not possible for me to confirm this.

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Hydrophilidae (Giant Water Scavenger Beetle) Beetle Adult Pictures

Collection details
Location: Namekagon River, Wisconsin
Date: January 13th, 2004
Added to site: January 25th, 2006
Author: Troutnut
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