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.

A small, old rock wing dam has created an excellent riffle and pool in this classic trout stream.

Stream photos

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Holocentropus Caddisfly Larva Holocentropus Caddisfly Larva

Dorsal view of a Holocentropus (Polycentropodidae) Caddisfly Larva from the Yakima River in Washington

This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.

11 Recently Added Photos

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 Brachycentrus fuliginosus (Grannoms)

This species was once given credit for the prolific Grannom hatches in the East. More recent authors suggest that this was an identification mix-up, and that this relatively uncommon species is not very important.

Where & when

Time of year : Spring

This species occurs in far northern trout streams in the continental U.S. and Canada.

In 15 records from GBIF, adults of this species have been collected during June (40%), July (27%), May (20%), and April (13%).

In 2 records from GBIF, this species has been collected at elevations of 3 and 20 ft.

Species Range

source

Map of specific collection sites

Start a Discussion of Brachycentrus fuliginosus

References

LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.
Schwiebert, Ernest G. 1955. Matching the Hatch. MacMillan Publishing Company.
Swisher, Doug and Carl Richards. 2000. Selective Trout. The Lyons Press.