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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.

The trees were leafing out and the trout were rising on this productive Wisconsin stream From the Namekagon River in Wisconsin

Stream photos

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Dorsal view of a Amphizoa (Amphizoidae) Beetle Larva from Sears Creek in Washington
This is the first of it's family I've seen, collected from a tiny, fishless stream in the Cascades. The three species of this genus all live in the Northwest and are predators that primarily eat stonefly nymphs Merritt R.W., Cummins, K.W., and Berg, M.B. (2019).
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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 Dicosmoecus gilvipes (October Caddisflies)

Where & when

Time of year : September and October

Preferred waters: Medium to large streams

According to LaFontaine in Caddisflies, this is the main species of Dicosmoecus in Idaho, Oregon, Washington, and British Columbia.

In 24 records from GBIF, adults of this species have mostly been collected during October (50%), September (38%), and November (8%).

In 6 records from GBIF, this species has been collected at elevations ranging from 16 to 3465 ft, with an average (median) of 755 ft.

Species Range
Map of specific collection sites

Specimens of the Caddisfly Species Dicosmoecus gilvipes

1 Female Adult
Female Dicosmoecus gilvipes (October Caddis) Caddisfly Adult
16 Pictures
Female Dicosmoecus gilvipes (Limnephilidae) (October Caddis) Caddisfly Adult from the South Fork Snoqualmie River in Washington
I've been hoping to add a really good October Caddis to the photo collection here for years, but so far I had struck out on finding them on the river. Tonight, this one flew into the kitchen during a pizza party at a house along the river, and was quickly pointed out -- one of the perks of hanging out with other aquatic biologists! Maybe next year I can finally get a salmonfly on taco night or something.
Added by Troutnut on September 29, 2017
Collected September 28, 2017 from the South Fork Snoqualmie River in Washington and added by Troutnut on September 29, 2017
2 Adults

1 Underwater Picture of Dicosmoecus gilvipes Caddisflies:


Start a Discussion of Dicosmoecus gilvipes

References

Caddisfly Species Dicosmoecus gilvipes (October Caddisflies)

Taxonomy
  1. Kingdom Animalia (Animals)
  2. » Phylum Arthropoda (Arthropods)
  3. » Class Insecta (Insects)
  4. » Order Trichoptera (Caddisflies)
  5. » Family Limnephilidae (Giant Sedges)
  6. » Genus Dicosmoecus (October Caddisflies)
  7. » Species gilvipes (October Caddisflies)
Species Range
Map of specific collection sites
Common Names
Resources
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