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.

This is one of the many shallow, unnamed lakes in the Arctic coastal plain near the Dalton Highway.

From Dalton Highway in Alaska

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.

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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.

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.

Mayfly Species Baetis magnus (BWOs)

This large western baetid is in the Rhodani group of closely related species that could probaly also be called the Baetis tricaudatus species complex. Besides its large overall size, large hind wings (for a baetid) with rounded margins and dark lateral bands of pigment on the abdomen are are also characteristic.

Where & when

In 11 records from GBIF, adults of this species have been collected during March (36%), May (27%), June (18%), July (9%), and April (9%).

In 14 records from GBIF, this species has been collected at elevations ranging from 3451 to 9318 ft, with an average (median) of 6207 ft.

Species Range

source

Map of specific collection sites

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