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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.

Outlet stream of Upper Titcomb Lake From Titcomb Basin in Wyoming

Stream photos

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Amphizoa Beetle LarvaAmphizoa Beetle Larva
Dorsal view of a Amphizoa (Amphizoidae) Beetle Larva from Sears Creek in Washington
This is the first of it's family I've seen, collected from a tiny, fishless stream in the Cascades. The three species of this genus all live in the Northwest and are predators that primarily eat stonefly nymphs Merritt R.W., Cummins, K.W., and Berg, M.B. (2019).
5 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. New York
    3. ›
  3. The Delaware River

  1. Trout Streams
    2. ›
  2. New York
    3. ›
  3. The Delaware River

Landscape & scenery photos from the Delaware River

Several anglers fish the tail of a famous pool, loomed over by a Catskill mountain. From the Delaware River, Junction Pool in New York
The Delaware River, Junction Pool in New York
Late-summer wildflowers bloom along a large trout river. From the Delaware River, Junction Pool in New York
The Delaware River, Junction Pool in New York
The Delaware River, Junction Pool in New York
The Delaware River in New York
The Delaware River in New York
The Delaware River in New York

Closeup insects by Troutnut from the Delaware River in New York

12
Male Penelomax septentrionalis Mayfly Nymph
A hairy mayfly nymph. This gangly, odd-looking nymph is from the rare species Ephemerella septentrionalis Artistic view of a Male Penelomax septentrionalis (Ephemerellidae) Mayfly Nymph from the Delaware River in New York
This is surely the most distinctive-looking species in Ephemerellidae. I like the rugged, spindly look. If mayflies made movies, Penelomax septentrionalis would probably play the supervillain. Maybe I should take a break and get something to eat.
9
Siphlonurus quebecensis (Gray Drake) Mayfly Nymph
Siphlonurus mayfly nymph. These mayflies are known as strong swimmers that maneuver like minnows across the stream bottom Artistic view of a Siphlonurus quebecensis (Siphlonuridae) (Gray Drake) Mayfly Nymph from the Delaware River in New York
8
Hydropsyche (Spotted Sedge) Caddisfly Pupa
Lateral view of a Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Pupa from the Delaware River in New York
Several users have interesting comments in the discussion of this specimen, but this observation by Creno is especially good: Also, this is what I would call an "immature" pupa. The wingpads of caddis pupae darken to nearly black as the enclosed adults near emerging. The darkening is the developing adult wing inside the pupal wing pad. The ultimate coloration of the adult wing is not very apparent in most pupal wing pads as the majority of the adult wing coloration comes from the color/position of the adult wing hairs and setae. But dark pupal wingpads are a good indication that the emergence will occur very soon, likely that day or so, and that the adult parts are sufficiently developed within the pupae to make a species determination from the specimen, particularly if it is a male.
6
Lepidostoma (Little Brown Sedge) Caddisfly Larva
Case view of a Lepidostoma (Lepidostomatidae) (Little Brown Sedge) Caddisfly Larva from the Delaware River in New York
4
Polycentropus (Brown Checkered Summer Sedge) Caddisfly Larva
Dorsal view of a Polycentropus (Polycentropodidae) (Brown Checkered Summer Sedge) Caddisfly Larva from the Delaware River in New York
3
Penelomax septentrionalis Mayfly Nymph
Dorsal view of a Penelomax septentrionalis (Ephemerellidae) Mayfly Nymph from the Delaware River in New York
3
Male Heptagenia culacantha Mayfly Dun
Photo credit: Hyun Kounne Dorsal view of a Male Heptagenia culacantha (Heptageniidae) Mayfly Dun from the Delaware River in New York
Hyun Kounne generously provided photos of the striking, hard-to-find Heptagenia culacantha from the mainstem Delaware River. She mentioned it was one of maybe half a dozen she saw on the water that day.
6
Sweltsa (Sallfly) Stonefly Nymph
Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Delaware River in New York
5
Siphlonurus quebecensis (Gray Drake) Mayfly Nymph
Dorsal view of a Siphlonurus quebecensis (Siphlonuridae) (Gray Drake) Mayfly Nymph from the Delaware River in New York
I photographed this nymph in the middle of molting between one instar and the next (not hatching).

References

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