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Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

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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Stonefly Species Acroneuria abnormis (Golden Stones)

Where & when

In 64 records from GBIF, adults of this species have mostly been collected during June (45%), July (27%), and May (22%).

In 48 records from GBIF, this species has been collected at elevations ranging from 20 to 10663 ft, with an average (median) of 1743 ft.

Species Range

Specimens of the Stonefly Species Acroneuria abnormis

3 Nymphs

Start a Discussion of Acroneuria abnormis

Stonefly Species Acroneuria abnormis (Golden Stones)

Species Range
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