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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.

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.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Female Leucrocuta hebe (Little Yellow Quill) Mayfly Dun Pictures

I found this dun on the same piece of stream as a similar spinner, probably of the same species.

Female Leucrocuta hebe (Heptageniidae) (Little Yellow Quill) Mayfly Dun from Mystery Creek #43 in New York
Lateral view of a Female Leucrocuta hebe (Heptageniidae) (Little Yellow Quill) Mayfly Dun from Mystery Creek #43 in New York
Female Leucrocuta hebe (Heptageniidae) (Little Yellow Quill) Mayfly Dun from Mystery Creek #43 in New York
Female Leucrocuta hebe (Heptageniidae) (Little Yellow Quill) Mayfly Dun from Mystery Creek #43 in New York
Female Leucrocuta hebe (Heptageniidae) (Little Yellow Quill) Mayfly Dun from Mystery Creek #43 in New York
Female Leucrocuta hebe (Heptageniidae) (Little Yellow Quill) Mayfly Dun from Mystery Creek #43 in New York
Dorsal view of a Female Leucrocuta hebe (Heptageniidae) (Little Yellow Quill) Mayfly Dun from Mystery Creek #43 in New York
Ventral view of a Female Leucrocuta hebe (Heptageniidae) (Little Yellow Quill) Mayfly Dun from Mystery Creek #43 in New York
Ruler view of a Female Leucrocuta hebe (Heptageniidae) (Little Yellow Quill) Mayfly Dun from Mystery Creek #43 in New York The smallest ruler marks are 1 mm.

This mayfly was collected from Mystery Creek #43 in New York on September 19th, 2006 and added to Troutnut.com by Troutnut on October 4th, 2006.

Discussions of this Dun

Looks like Leucrocuta
Posted by GONZO on Oct 6, 2006
Last reply on Oct 6, 2006 by GONZO
Haven't checked any keys to verify, but most of the little late-season Cahill-looking duns are Leucrocuta. If I had to guess at the species, I'd say hebe (Little Yellow Quill). It is probably the most common L. spp. in the East and has a long hatching period that extends well into the fall.

I would also agree that the spinner you photographed is the same species.

Start a Discussion of Dun

Female Leucrocuta hebe (Little Yellow Quill) Mayfly Dun Pictures

Collection details
Location: Mystery Creek #43, New York
Date: September 19th, 2006
Added to site: October 4th, 2006
Author: Troutnut
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