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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.

Dorsal view of a Limnephilidae (Giant Sedges) Caddisfly Larva from the Yakima River in Washington
This specimen resembled several others of around the same size and perhaps the same species, which were pretty common in my February sample from the upper Yakima. Unfortunately, I misplaced the specimen before I could get it under a microscope for a definitive ID.
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.
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Neoleptophlebia Mayfly Nymph Pictures

Dorsal view of a Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the South Fork Snoqualmie River in Washington
Ruler view of a Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the South Fork Snoqualmie River in Washington The smallest ruler marks are 1/16".
Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the South Fork Snoqualmie River in Washington
Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the South Fork Snoqualmie River in Washington
Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the South Fork Snoqualmie River in Washington
Ventral view of a Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the South Fork Snoqualmie River in Washington

This mayfly was collected from the South Fork Snoqualmie River in Washington on June 16th, 2018 and added to Troutnut.com by Troutnut on July 3rd, 2018.

Discussions of this Nymph

Neoleptophlebia
Posted by Millcreek on Jul 19, 2019
Last reply on Jul 19, 2019 by Millcreek
This nymph should be under Neoleptophlebia. Paper is here. http://biosoil.ru/files/00013828.pdf

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Neoleptophlebia Mayfly Nymph Pictures

Collection details
Location: South Fork Snoqualmie River, Washington
Date: June 16th, 2018
Added to site: July 3rd, 2018
Author: Troutnut
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