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.

Inlet of Upper Titcomb Lake

From Titcomb Basin in Wyoming

Stream photos

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Limnephilus (Summer Flier Sedge) Caddisfly Larva Limnephilus (Summer Flier Sedge) Caddisfly Larva

Case view of a Limnephilus (Limnephilidae) (Summer Flier Sedge) Caddisfly Larva from the Yakima River in Washington

This seems to be a young larva of Limnephilus. Although not clear in the picture, several ventral abdominal segments have chloride epithelia.

7 Recently Added Photos

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.

Male Epeorus vitreus (Sulphur) Mayfly Spinner Pictures

Lateral view of a Male Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Spinner from Penn's Creek in Pennsylvania

Male Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Spinner from Penn's Creek in Pennsylvania

Dorsal view of a Male Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Spinner from Penn's Creek in Pennsylvania

Ruler view of a Male Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Spinner from Penn's Creek in Pennsylvania The smallest ruler marks are 1 mm.

This mayfly was collected from Penn's Creek in Pennsylvania on May 26th, 2007 and added to Troutnut.com by Troutnut on June 4th, 2007.

Discussions of this Spinner

Probably another E. vitreus

Posted by GONZO on Oct 28, 2008

Last reply on Oct 28, 2008 by GONZO

This looks like a male vitreus spinner. Although blurry, the terminalia look about right. The dark humeral vein and the little dark marks on the middle rear of segments 3-5 and 7-9 also seem to fit.

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