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.

We were lucky to be able to fish through this storm as it skirted around us to the north, giving us just enough clouds to prompt a BWO hatch but keeping the lighting at a safe distance.

From Slough Creek in Wyoming

Stream photos

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Limnephilus (Summer Flier Sedge) Caddisfly Larva Limnephilus (Summer Flier Sedge) Caddisfly Larva

Case view of a Limnephilus (Limnephilidae) (Summer Flier Sedge) Caddisfly Larva from the Yakima River in Washington

This seems to be a young larva of Limnephilus. Although not clear in the picture, several ventral abdominal segments have chloride epithelia.

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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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Site updates from May 5, 2007

Closeup insects by Bnewell from the Upper Stillwater River in Montana

Acerpenna pygmaea (Tiny Blue-Winged Olive) Mayfly Nymph

3 Pictures

Acerpenna pygmaea (Baetidae) (Tiny Blue-Winged Olive) Mayfly Nymph from the Upper Stillwater River in Montana

This is a very rare mayfly in western Montana. The shape of the last gill is a key to its identification. I have collected this species in only one location.

Collected May 4, 2007 from the Upper Stillwater River in Montana

Added by Bnewell on June 26, 2011

Collected May 4, 2007 from the Upper Stillwater River in Montana and added by Bnewell on June 26, 2011