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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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Eurylophella (Chocolate Dun) Mayfly Nymph Pictures

Eurylophella (Ephemerellidae) (Chocolate Dun) Mayfly Nymph from Mongaup Creek in New York
Eurylophella (Ephemerellidae) (Chocolate Dun) Mayfly Nymph from Mongaup Creek in New York
Eurylophella (Ephemerellidae) (Chocolate Dun) Mayfly Nymph from Mongaup Creek in New York
Eurylophella (Ephemerellidae) (Chocolate Dun) Mayfly Nymph from Mongaup Creek in New York
Dorsal view of a Eurylophella (Ephemerellidae) (Chocolate Dun) Mayfly Nymph from Mongaup Creek in New York
Eurylophella (Ephemerellidae) (Chocolate Dun) Mayfly Nymph from Mongaup Creek in New York
Lateral view of a Eurylophella (Ephemerellidae) (Chocolate Dun) Mayfly Nymph from Mongaup Creek in New York
Ruler view of a Eurylophella (Ephemerellidae) (Chocolate Dun) Mayfly Nymph from Mongaup Creek in New York The smallest ruler marks are 1 mm.

This mayfly was collected from Mongaup Creek in New York on May 6th, 2007 and added to Troutnut.com by Troutnut on May 18th, 2007.


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Eurylophella (Chocolate Dun) Mayfly Nymph Pictures

Collection details
Location: Mongaup Creek, New York
Date: May 6th, 2007
Added to site: May 18th, 2007
Author: Troutnut
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