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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.

Lateral view of a Psychodidae True Fly Larva from Mystery Creek #308 in Washington
This wild-looking little thing completely puzzled me. At first I was thinking beetle or month larva, until I got a look at the pictures on the computer screen. I made a couple of incorrect guesses before entomologist Greg Courtney pointed me in the right direction with Psychodidae. He suggested a possible genus of Thornburghiella, but could not rule out some other members of the tribe Pericomini.
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.

Caddisfly Species Hydatophylax argus (Giant Cream Pattern-Wing Sedges)

This is an especially large species, with pupae and adults up to hook size 2.

Where & when

Time of year : June through fall

Preferred waters: Small streams

In 53 records from GBIF, adults of this species have mostly been collected during June (55%), May (21%), and July (19%).

In 13 records from GBIF, this species has been collected at elevations ranging from 627 to 2740 ft, with an average (median) of 2008 ft.

Species Range

Hatching behavior

Time of day : Morning

Gary LaFontaine reports in Caddisflies that his trout stomach samples held many Hydatophylax argus pupae during their emergence in the East.

Specimens of the Caddisfly Species Hydatophylax argus

1 Female Adult

Start a Discussion of Hydatophylax argus

References

Caddisfly Species Hydatophylax argus (Giant Cream Pattern-Wing Sedges)

Taxonomy
Species Range
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