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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.
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Female Penelomax septentrionalis Mayfly Dun Pictures

I'm confident this dun belongs to septentrionalis, because her legs are just too long for any other Ephemerellid, and her unusual mid-dorsal stripe matches those of two easily identified nymphs I collected some miles downstream.

This really pretty mayfly was in kind of bad shape when I found it crippled on the surface, and bouncing around in my container with a bunch of green drakes didn't help.

Ruler view of a Female Penelomax septentrionalis (Ephemerellidae) Mayfly Dun from the West Branch of the Delaware River in New York The smallest ruler marks are 1 mm.
Lateral view of a Female Penelomax septentrionalis (Ephemerellidae) Mayfly Dun from the West Branch of the Delaware River in New York
Female Penelomax septentrionalis (Ephemerellidae) Mayfly Dun from the West Branch of the Delaware River in New York
Female Penelomax septentrionalis (Ephemerellidae) Mayfly Dun from the West Branch of the Delaware River in New York
Female Penelomax septentrionalis (Ephemerellidae) Mayfly Dun from the West Branch of the Delaware River in New York
Female Penelomax septentrionalis (Ephemerellidae) Mayfly Dun from the West Branch of the Delaware River in New York
Dorsal view of a Female Penelomax septentrionalis (Ephemerellidae) Mayfly Dun from the West Branch of the Delaware River in New York
Female Penelomax septentrionalis (Ephemerellidae) Mayfly Dun from the West Branch of the Delaware River in New York
Female Penelomax septentrionalis (Ephemerellidae) Mayfly Dun from the West Branch of the Delaware River in New York
Ventral view of a Female Penelomax septentrionalis (Ephemerellidae) Mayfly Dun from the West Branch of the Delaware River in New York

This mayfly was collected from the West Branch of the Delaware River in New York on June 1st, 2007 and added to Troutnut.com by Troutnut on June 4th, 2007.


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Female Penelomax septentrionalis Mayfly Dun Pictures

Collection details
Location: West Branch of the Delaware River, New York
Date: June 1st, 2007
Added to site: June 4th, 2007
Author: Troutnut
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