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.

Stream photos

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Isoperla (Stripetails and Yellow Stones) Stonefly Adult Isoperla (Stripetails and Yellow Stones) Stonefly Adult

Dorsal view of a Isoperla (Perlodidae) (Stripetails and Yellow Stones) Stonefly Adult from Mystery Creek #308 in Washington

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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 Stenonema terminatum Mayfly Spinner Pictures

I positively identified this specimen under a microscope with a good key. It was one of the more common species in a generally light mixed bag of mayflies over a big Catskill tailwater last night.

I swooped this one out of the air while it was mating with a female, so I can be certain about her ID as well.

Ruler view of a Male Stenonema terminatum (Heptageniidae) Mayfly Spinner from the West Branch of the Delaware River in New York The smallest ruler marks are 1 mm.

Lateral view of a Male Stenonema terminatum (Heptageniidae) Mayfly Spinner from the West Branch of the Delaware River in New York

Male Stenonema terminatum (Heptageniidae) Mayfly Spinner from the West Branch of the Delaware River in New York

Artistic view of a Male Stenonema terminatum (Heptageniidae) Mayfly Spinner from the West Branch of the Delaware River in New York

Dorsal view of a Male Stenonema terminatum (Heptageniidae) Mayfly Spinner from the West Branch of the Delaware River in New York

This mayfly was collected from the West Branch of the Delaware River in New York on June 7th, 2007 and added to Troutnut.com by Troutnut on June 8th, 2007.

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