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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.

This view of the pipeline, the Atigun River, and an impressive sunset/rise was one of my first views of the North Slope as I came through Atigun Pass in the middle of the night. From the Atigun River in Alaska

Stream photos

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Holocentropus Caddisfly LarvaHolocentropus 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.

  1. Trout Streams
    2. ›
  2. Wisconsin
    3. ›
  3. The Long Lake Branch of the White River

  1. Trout Streams
    2. ›
  2. Wisconsin
    3. ›
  3. The Long Lake Branch of the White River

Closeup insects by Troutnut from the Long Lake Branch of the White River in Wisconsin

11
Rhyacophila (Green Sedge) Caddisfly Pupa
Rhyacophila (Rhyacophilidae) (Green Sedge) Caddisfly Pupa from the Long Lake Branch of the White River in Wisconsin
I collected this pupa and several like it from the same stream and on the same day as this larva. I suspect they're the same species. Every pupa I collected was in a brown casing like the one shown in one of the pictures below. I cut this pupa out of its case after a picture so you can see more details. It is close to but not fully developed.
3
Baetidae (Blue-Winged Olive) Mayfly Nymph
Dorsal view of a Baetidae (Blue-Winged Olive) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin
7
Drunella cornuta (Large Blue-Winged Olive) Mayfly Nymph
Dorsal view of a Drunella cornuta (Ephemerellidae) (Large Blue-Winged Olive) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin
5
Rhithrogena impersonata (Dark Red Quill) Mayfly Nymph
Dorsal view of a Rhithrogena impersonata (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin
11
Rhyacophila fuscula (Green Sedge) Caddisfly Larva
Dorsal view of a Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from the Long Lake Branch of the White River in Wisconsin
I collected this larva and several like it from the same stream and on the same day as this pupa. I suspect they're the same species.
8
Rhithrogena impersonata (Dark Red Quill) Mayfly Nymph
Dorsal view of a Rhithrogena impersonata (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin
This specimen shows one of two distinct color types of Rhithrogena impersonata nymphs. This type is very reddish, especially in the gills, perhaps a representative of the form formerly known as a separate speciesRhithrogena sanguinea.
11
Female Heptageniidae (March Browns, Cahills, Quill Gordons) Mayfly Dun
Dorsal view of a Female Heptageniidae (March Browns, Cahills, Quill Gordons) Mayfly Dun from the Long Lake Branch of the White River in Wisconsin
This specimen is really strange, very different in form from any other mayfly I've seen. Unfortunately it was found alone crippled in an eddy and in pretty bad shape, and I couldn't find any others like it.
5
Heptagenia pulla (Golden Dun) Mayfly Nymph
Lateral view of a Heptagenia pulla (Heptageniidae) (Golden Dun) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin
I used a microscope to positively identify this nymph as Heptagenia pulla. (Edit six years later: I wish I had explained why I was positive about this. It may have been based on color patterns in an angling text, which are not especially reliable for species ID anymore.)
5
Ephemerella needhami (Little Dark Hendrickson) Mayfly Nymph
Dorsal view of a Ephemerella needhami (Ephemerellidae) (Little Dark Hendrickson) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin
This specimen strikingly resembles another specimen from about 1300 miles away in the Catskills, which I tentatively called Ephemerella aurivillii. This one has much more prominent abdominal tubercles. It may be that they're both the same species and I don't have my identifications straight.
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