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.

Stream photos

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Isoperla (Stripetails and Yellow Stones) Stonefly Adult Isoperla (Stripetails and Yellow Stones) Stonefly Adult

Dorsal view of a Isoperla (Perlodidae) (Stripetails and Yellow Stones) Stonefly Adult from Mystery Creek #308 in Washington

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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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Caddisfly Species Nectopsyche diarina (White Millers)

Where & when

Time of year : Midsummer

This is an important species.

In 60 records from GBIF, adults of this species have mostly been collected during July (33%), June (28%), August (23%), and September (12%).

In 50 records from GBIF, this species has been collected at elevations ranging from 797 to 11401 ft, with an average (median) of 5610 ft.

Species Range

source

Map of specific collection sites

Larva & pupa biology

Current speed: Fast

Substrate: Rocks

Environmental tolerance: Prefers clear water

The preference of this species for fast, rocky habitat is unusual for the family Leptoceridae.

Start a Discussion of Nectopsyche diarina

References

LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.