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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.

The Middle Fork of the Koyukuk River in Alaska

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Glossosoma (Little Brown Short-horned Sedge) Caddisfly Larva Glossosoma (Little Brown Short-horned Sedge) Caddisfly Larva

Dorsal view of a Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington

I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae 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.

Updates from May 31, 2007

Updates from May 31, 2007

Photos by Troutnut from the West Branch of the Delaware River in New York

This fish almost got me into the coveted "20/20 club." It's a 20 inch brown caught on sulphur-flavored Galloup's Cripple tied on a size 18 3X-fine dry fly hook. It's also my biggest fish to date from the Catskills.

The West Branch of the Delaware River in New York

On-stream insect photos by Troutnut from the West Branch of the Delaware River in New York

I didn't manage to collect a nymph, but here's the hollow shuck left over from an emerged dun, showing the basic pattern of the nymph.

From the West Branch of the Delaware River in New York

Closeup insects by Troutnut from the West Branch of the Delaware River in New York

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Female Ephemera guttulata (Green Drake) Mayfly Dun

Artistic view of a Female Ephemera guttulata (Ephemeridae) (Green Drake) Mayfly Dun from the West Branch of the Delaware River in New York

For years after I started this website, I was eagerly hoping to find a green drake to add to the collection, but I was never in the right part of the world at the right time. It finally happened on June 1st, 2007.

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Female Ephemera guttulata (Green Drake) Mayfly Spinner

Lateral view of a Female Ephemera guttulata (Ephemeridae) (Green Drake) Mayfly Spinner from the West Branch of the Delaware River in New York

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Male Ephemerella needhami (Little Dark Hendrickson) Mayfly Dun

Lateral view of a Male Ephemerella needhami (Ephemerellidae) (Little Dark Hendrickson) Mayfly Dun from the West Branch of the Delaware River in New York

See the comments for an interesting discussion of the identification of this dun.

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Male Psilotreta labida (Dark Blue Sedge) Caddisfly Adult

Lateral view of a Male Psilotreta labida (Odontoceridae) (Dark Blue Sedge) Caddisfly Adult from the West Branch of the Delaware River in New York

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Female Penelomax septentrionalis Mayfly Dun

Lateral view of a Female Penelomax septentrionalis (Ephemerellidae) Mayfly Dun from the West Branch of the Delaware River in New York

I'm confident this dun belongs to septentrionalis, because her legs are just too long for any other Ephemerellid, and her unusual mid-dorsal stripe matches those of two easily identified nymphs I collected some miles downstream. This really pretty mayfly was in kind of bad shape when I found it crippled on the surface, and bouncing around in my container with a bunch of green drakes didn't help.

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Female Neoleptophlebia Mayfly Dun

Lateral view of a Female Neoleptophlebia (Leptophlebiidae) Mayfly Dun from the West Branch of the Delaware River in New York

I'm just guessing Neoleptophlebia instead of Paraleptophlebia on this one because I tended to find more of their nymphs in the area, but take that with a grain of salt.

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