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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 Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the Yakima River in Washington
Some characteristics from the microscope images for the tentative species id: The postero-lateral projections are found only on segment 9, not segment 8. Based on the key in Jacobus et al. (2014), it appears to key to Neoleptophlebia adoptiva or Neoleptophlebia heteronea, same as this specimen with pretty different abdominal markings. However, distinguishing between those calls for comparing the lengths of the second and third segment of the labial palp, and this one (like the other one) only seems to have two segments. So I'm stuck on them both. It's likely that the fact that they're immature nymphs stymies identification in some important way.
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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Baetis flavistriga (Dark Blue-Winged Olive) Mayfly Nymph Pictures

This mayfly was collected from the Kwethluk River in Alaska on June 19th, 2011 and added to Troutnut.com by Bnewell on June 26th, 2011.


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Baetis flavistriga (Dark Blue-Winged Olive) Mayfly Nymph Pictures

Collection details
Location: Kwethluk River, Alaska
Date: June 19th, 2011
Added to site: June 26th, 2011
Author: Bnewell
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