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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Pycnopsyche guttifera (Great Autumn Brown Sedge) Caddisfly Larva Pycnopsyche guttifera (Great Autumn Brown Sedge) Caddisfly Larva

Dorsal view of a Pycnopsyche guttifera (Limnephilidae) (Great Autumn Brown Sedge) Caddisfly Larva from the Yakima River in Washington

This specimen appears to be of the same species as this one collected in the same spot two months earlier. The identification of both is tentative. This one suffered some physical damage before being photographed, too, so the colors aren't totally natural. I was mostly photographing it to test out some new camera setting idea, which worked really well for a couple of closeups.

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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 (Green Sedge) Caddisfly Larva Pictures

Dave Ruiter identified this specimen as part of the Rhyacophila betteni group, but with over 20 species it's difficult to narrow down beyond that.

Lateral view of a Rhyacophila (Rhyacophilidae) (Green Sedge) Caddisfly Larva from Mystery Creek #249 in Washington

Rhyacophila (Rhyacophilidae) (Green Sedge) Caddisfly Larva from Mystery Creek #249 in Washington

Ventral view of a Rhyacophila (Rhyacophilidae) (Green Sedge) Caddisfly Larva from Mystery Creek #249 in Washington

Ruler view of a Rhyacophila (Rhyacophilidae) (Green Sedge) Caddisfly Larva from Mystery Creek #249 in Washington The smallest ruler marks are 1 mm.

This caddisfly was collected from Mystery Creek #249 in Washington on July 25th, 2019 and added to Troutnut.com by Troutnut on July 26th, 2019.

Discussions of this Larva

Rhyacophila betteni group

2 replies

Posted by Creno on Aug 8, 2019

Last reply on Aug 10, 2019 by Creno

This is one of the Rhyacophila betteni group. The R. betteni group consists of over 20 widespread, western species; common in small to medium, rocky trout streams.

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