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.

Upper Titcomb Lake

From Titcomb Basin in Wyoming

Stream photos

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Skwala (Large Springfly) Stonefly Nymph Skwala (Large Springfly) Stonefly Nymph

Dorsal view of a Skwala (Perlodidae) (Large Springfly) Stonefly Nymph from the Yakima River in Washington

This Skwala nymph still has a couple months left to go before hatching, but it's still a good representative of its species, which was extremely abundant in my sample for a stonefly of this size. It's obvious why the Yakima is known for its Skwala hatch.

6 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.

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Acroneuria lycorias (Golden Stone) Stonefly Nymph Pictures

This stonefly was collected from the Namekagon River in Wisconsin on January 13th, 2004 and added to Troutnut.com by Troutnut on January 25th, 2006.

Discussions of this Nymph

Moved to Acroneuria lycorias

Posted by Entoman on Apr 8, 2013

Last reply on Apr 8, 2013 by Entoman

Here's a good example of an Acroneurinae species other than A. abnormis that can have a dark body. The presence of anal gills and a thick occiptal bar impinged by a black spot in the middle point to lycorias. The picture is dark and the angle gives the head the flat based triangle look of the Perlinae, but if you enlarge the photo and look closely, the pale occipital bar at the back of the head is located where the ridge should be, precluding that subfamily.

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