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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Dorsal view of a Holocentropus (Polycentropodidae) Caddisfly Larva from the Yakima River in Washington
This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.
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 Epeorus pleuralis (Quill Gordon) Mayfly Dun Pictures

Lateral view of a Male Epeorus pleuralis (Heptageniidae) (Quill Gordon) Mayfly Dun from the Beaverkill River in New York
Male Epeorus pleuralis (Heptageniidae) (Quill Gordon) Mayfly Dun from the Beaverkill River in New York
Male Epeorus pleuralis (Heptageniidae) (Quill Gordon) Mayfly Dun from the Beaverkill River in New York
Ventral view of a Male Epeorus pleuralis (Heptageniidae) (Quill Gordon) Mayfly Dun from the Beaverkill River in New York
Male Epeorus pleuralis (Heptageniidae) (Quill Gordon) Mayfly Dun from the Beaverkill River in New York
Male Epeorus pleuralis (Heptageniidae) (Quill Gordon) Mayfly Dun from the Beaverkill River in New York
Male Epeorus pleuralis (Heptageniidae) (Quill Gordon) Mayfly Dun from the Beaverkill River in New York
Male Epeorus pleuralis (Heptageniidae) (Quill Gordon) Mayfly Dun from the Beaverkill River in New York
Male Epeorus pleuralis (Heptageniidae) (Quill Gordon) Mayfly Dun from the Beaverkill River in New York

This mayfly was collected from the Beaverkill River in New York on May 7th, 2005 and added to Troutnut.com by Troutnut on May 16th, 2006.

Discussions of this Dun

Today's Quill Gordon
34 replies
Posted by Beachvid on Feb 5, 2007
Last reply on Mar 27, 2013 by Feathers5
Great pictures of the Quill Gordon. I am aware that color means nothing but these pictures of the body are much more yellow than the normal mahogony body color. I also noted you took them in May and this seems late for them to be around for that area. Are you sure the species is correct?

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Male Epeorus pleuralis (Quill Gordon) Mayfly Dun Pictures

Collection details
Location: Beaverkill River, New York
Date: May 7th, 2005
Added to site: May 16th, 2006
Author: Troutnut
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