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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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Drunella grandis (Western Green Drake) Mayfly Nymph Pictures

Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the South Fork Snoqualmie River in Washington
Dorsal view of a Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the South Fork Snoqualmie River in Washington
Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the South Fork Snoqualmie River in Washington
Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the South Fork Snoqualmie River in Washington
Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the South Fork Snoqualmie River in Washington
Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the South Fork Snoqualmie River in Washington
Ventral view of a Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the South Fork Snoqualmie River in Washington
Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the South Fork Snoqualmie River in Washington
Ruler view of a Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the South Fork Snoqualmie River in Washington The smallest ruler marks are 1 mm.
Drunella grandis (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the South Fork Snoqualmie River in Washington

This mayfly was collected from the South Fork Snoqualmie River in Washington on June 16th, 2018 and added to Troutnut.com by Troutnut on June 18th, 2018.


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Drunella grandis (Western Green Drake) Mayfly Nymph Pictures

Collection details
Location: South Fork Snoqualmie River, Washington
Date: June 16th, 2018
Added to site: June 18th, 2018
Author: Troutnut
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