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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.

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 Heptagenia culacantha Mayfly Dun Pictures

Hyun Kounne generously provided photos of the striking, hard-to-find Heptagenia culacantha from the mainstem Delaware River. She mentioned it was one of maybe half a dozen she saw on the water that day.

Photo credit: Hyun Kounne

Male Heptagenia culacantha (Heptageniidae) Mayfly Dun from the Delaware River in New York
Photo credit: Hyun Kounne

Male Heptagenia culacantha (Heptageniidae) Mayfly Dun from the Delaware River in New York
Photo credit: Hyun Kounne

Dorsal view of a Male Heptagenia culacantha (Heptageniidae) Mayfly Dun from the Delaware River in New York

This mayfly was collected from the Delaware River in New York on June 3rd, 2017 and added to Troutnut.com by Troutnut on December 5th, 2019.


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Male Heptagenia culacantha Mayfly Dun Pictures

Collection details
Location: Delaware River, New York
Date: June 3rd, 2017
Added to site: December 5th, 2019
Author: Troutnut
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