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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.

Dorsal view of a Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington
This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.
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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Female Kogotus nonus (Smooth Springfly) Stonefly Adult Pictures

Ruler view of a Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington The smallest ruler marks are 1 mm.
Lateral view of a Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Ventral view of a Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
Dorsal view of a Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington
The turtle-shell-like shape of these eggs is important to IDing this species.

Female Kogotus nonus (Perlodidae) (Smooth Springfly) Stonefly Adult from Mystery Creek #199 in Washington

This stonefly was collected from Mystery Creek #199 in Washington on July 28th, 2019 and added to Troutnut.com by Troutnut on July 30th, 2019.


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Female Kogotus nonus (Smooth Springfly) Stonefly Adult Pictures

Collection details
Location: Mystery Creek #199, Washington
Date: July 28th, 2019
Added to site: July 30th, 2019
Author: Troutnut
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