Header image
Enter a name
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 Epeorus albertae (Heptageniidae) (Pink Lady) Mayfly Nymph from the East Fork Issaquah Creek in Washington
This specimen keys to the Epeorus albertae group of species. Of the five species in that group, the two known in Washington state are Epeorus albertae and Epeorus dulciana. Of the two, albertae has been collected in vastly more locations in Washington than dulciana, suggesting it is far more common. On that basis alone I'm tentatively putting this nymph in albertae, with the large caveat that there's no real information to rule out dulciana.
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.

Cream Duns

Like most common names,"Cream Dun" can refer to more than one taxon. They're previewed below, along with 2 specimens. For more detail click through to the scientific names.

Mayfly Species Anthopotamus distinctus

These are often called Cream Duns.

Mayfly Species Stenonema ithaca

These are very rarely called Cream Duns.
Lateral view of a Female Stenonema ithaca (Heptageniidae) (Light Cahill) Mayfly Dun from the Little Juniata River in Pennsylvania
This female looks very much like a male I collected a few hundred miles away a few days later, so I'm guessing it's the same species, which I believe is Maccaffertium mediopunctatum.
Lateral view of a Stenonema ithaca (Heptageniidae) (Light Cahill) Mayfly Nymph from Paradise Creek in Pennsylvania
This specimen seems to be of the same species as a dun I photographed which emerged from another nymph in the same sample.

Cream Duns

Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy