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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 Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington
This species was fairly abundant in a February sample of the upper Yakima.
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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Stonefly Species Pteronarcys biloba (Knobbed Salmonflies)

Where & when

This is a small-stream species from the Appalachian states.
Species Range

Specimens of the Stonefly Species Pteronarcys biloba

1 Nymph

Start a Discussion of Pteronarcys biloba

Stonefly Species Pteronarcys biloba (Knobbed Salmonflies)

Taxonomy
Species Range
Resources
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