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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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Male Litobrancha recurvata (Dark Green Drake) Mayfly Dun Pictures

These photos were contributed by Spencer Vanderhoof.

This mayfly was collected from the Au Sable River (Mainstream) in Michigan on May 15th, 2010 and added to Troutnut.com by Entoman on March 3rd, 2012.


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Male Litobrancha recurvata (Dark Green Drake) Mayfly Dun Pictures

Collection details
Location: Au Sable River (Mainstream), Michigan
Date: May 15th, 2010
Added to site: March 3rd, 2012
Author: Entoman
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