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.

A small, old rock wing dam has created an excellent riffle and pool in this classic trout stream.

Stream photos

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Sweltsa (Sallfly) Stonefly Nymph Sweltsa (Sallfly) Stonefly Nymph

Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington

This species was fairly abundant in a February sample of the upper Yakima.

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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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Rhyacophila brunnea (Green Sedge) Caddisfly Larva Pictures

This caddisfly was collected from unknown in Wisconsin on February 7th, 2004 and added to Troutnut.com by Troutnut on January 25th, 2006.

Discussions of this Larva

Could be Himalopsyche?

1 replies

Posted by Litobrancha on Sep 5, 2006

Last reply on Sep 5, 2006 by Troutnut

Wow! Looks like Himalopsyche, a Rhyacophilid we don't get down here. World checklist has one Nearctic species, H. phryganea. Quick note, Himalopsyche fifth instars are huge and supposed to have thoracic branched gills too. Not sure what other Rhyacophila larvae have abdominal gills, in the SE USA only R. brunnea does and i've never seen it. Great photo!

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