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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.
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.

Ephemerella excrucians (Pale Morning Dun) Mayfly Nymph Pictures

This specimen was collected together with a darker one of the same species.

Ventral view of a Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Nymph from Mongaup Creek in New York
The whorls of spines around the tail segments on this nymph had me thinking it was in the closely related Serratella genus for a while, but this close-up picture reveals the web of fine setae that sets the Ephemerella genus apart.

Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Nymph from Mongaup Creek in New York
Ruler view of a Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Nymph from Mongaup Creek in New York The smallest ruler marks are 1 mm.
Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Nymph from Mongaup Creek in New York
Dorsal view of a Ephemerella excrucians (Ephemerellidae) (Pale Morning Dun) Mayfly Nymph from Mongaup Creek in New York

This mayfly was collected from Mongaup Creek in New York on April 19th, 2006 and added to Troutnut.com by Troutnut on April 21st, 2006.


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Ephemerella excrucians (Pale Morning Dun) Mayfly Nymph Pictures

Collection details
Location: Mongaup Creek, New York
Date: April 19th, 2006
Added to site: April 21st, 2006
Author: Troutnut
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