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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

This little pool in update New York is enjoyed by many tourists every day, and it still holds a few trout -- stockers mostly, but you can't complain about the setting! From Mystery Creek # 62 in New York

Stream photos

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Hydropsyche (Spotted Sedge) Caddisfly LarvaHydropsyche (Spotted Sedge) Caddisfly Larva
Ventral view of a Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Larva from the Yakima River in Washington
With a bit of help from the microscope, this specimen keys clearly and unsurprisingly to Hydropsyche.
9 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.

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  3. Factory Brook

  1. Trout Streams
    2. ›
  2. New York
    3. ›
  3. Factory Brook

Landscape & scenery photos from Factory Brook

Factory Brook in New York
This might be the most impossible fly-casting situation I've ever seen, a thicket along a creek which normally has relatively easy casting. From Factory Brook in New York

Closeup insects by Troutnut from Factory Brook in New York

7
Male Neoleptophlebia adoptiva (Blue Quill) Mayfly Spinner
Lateral view of a Male Neoleptophlebia adoptiva (Leptophlebiidae) (Blue Quill) Mayfly Spinner from Factory Brook in New York
Based on the pale longitudinal forewing veins (excepting the costals), dark middle terga, and genitalia (Burks '53), this specimen is P. adoptiva.
10
Male Epeorus (Little Maryatt) Mayfly Spinner
Artistic view of a Male Epeorus (Heptageniidae) (Little Maryatt) Mayfly Spinner from Unnamed trib of Factory Brook along 42a in New York
This spinner and hundreds of others like it were dancing over the road through a very narrow valley carved by a tiny, steep tributary of the trout stream I was fishing. I got strange looks from a few passers-by, standing around on the road with a butterfly net...
6
Female Leptophlebia (Black Quill) Mayfly Spinner
Lateral view of a Female Leptophlebia (Leptophlebiidae) (Black Quill) Mayfly Spinner from Factory Brook in New York
I collected this specimen along with a female dun of the same species. Unfortunately it's not in very good shape. After poking at it for a while under a microscope with a good scientific key in hand, I'm pretty sure this is either Leptophlebia cupida or Leptophlebia nebulosa. I can't tell which.
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Female Leptophlebia (Black Quill) Mayfly Dun
Lateral view of a Female Leptophlebia (Leptophlebiidae) (Black Quill) Mayfly Dun from Factory Brook in New York
I collected this mayfly after user Al514 tipped me off to the presence of some Leptophlebia mayflies I didn't seem to have yet with his ID request of a male dun. This seems to be of the same species. I also collected a female spinner. Based on that spinner, I can tell that this is either Leptophlebia cupida or Leptophlebia nebulosa, but I can't tell which. Unfortunately none of the specimens I collected made it through the hot, sunny day very well. So the pictures aren't great, but they're better than nothing.
13
Nigronia serricornis (Fishfly) Hellgrammite Larva
Artistic view of a Nigronia serricornis (Corydalidae) (Fishfly) Hellgrammite Larva from Factory Brook in New York
I unfortunately lost some of the originals of this specimen, so I was only able to re-process about half the pictures in the 2023 update.
3
Epeorus (Little Maryatt) Mayfly Nymph
Dorsal view of a Epeorus (Heptageniidae) (Little Maryatt) Mayfly Nymph from Factory Brook in New York
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