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.

Mount Deborah and Hess Mountains. Two of the greatest peaks of the Alaska Range rise behind the braided, glacial Susitna River. These massive mountains are 35 miles north of where I took this picture.

From the Susitna River in Alaska

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.

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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.

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.

Rhyacophila fuscula (Green Sedge) Caddisfly Larva Pictures

Ruler view of a Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from Mystery Creek #62 in New York The smallest ruler marks are 1 mm.

Dorsal view of a Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from Mystery Creek #62 in New York

Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from Mystery Creek #62 in New York

Ventral view of a Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from Mystery Creek #62 in New York

Lateral view of a Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from Mystery Creek #62 in New York

This picture came out poorly, but it still shows pretty well just what effective tools those rear prolegs are for caddis larvae to grip the rocks. It can be surprisingly hard to pick them up when they're grabbing onto something.

Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from Mystery Creek #62 in New York

Artistic view of a Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from Mystery Creek #62 in New York

This caddisfly was collected from Mystery Creek #62 in New York on April 1st, 2007 and added to Troutnut.com by Troutnut on April 3rd, 2007.

Discussions of this Larva

nice creatures

1 replies

Posted by Avinaash on Feb 20, 2018

Last reply on Feb 20, 2018 by Taxon

just starting my research on these

sedge larva

4 replies

Posted by HELENE on Oct 10, 2007

Last reply on Aug 9, 2012 by Sayfu

I've found some sedge larva (?) in a small stream in Wales, living in small tiny, tiny pebbles, like a tunnel! I do recognize the head and legs and would love to know a little bit more about them! Some also had sticks glued to the pebbles, looking like grasshoppers that's drowned! I shall look forward to hearing from you on my e-mail - helenemills2@yahoo.co.uk - Thanks Helene Mills

insect help

21 replies

Posted by Herefishy on Apr 7, 2007

Last reply on Jan 9, 2012 by Entoman

I'm new to flyfishing and the art/ science of insect identification.
This caddis larvae is also known as a hellgramite- correct? Is a caddis larvae and a caddisfly the same? Are there any simple books out there that will help me get started with realy understanding the food that trout eat?

Rhyacophila Emergence

2 replies

Posted by Flybyknight on Nov 23, 2007

Last reply on Jan 28, 2010 by FlyDoc

Interesting to learn that Jason collected R. fuscula April 1st. My hatch chart for the East Branch Delaware needs to be corrected, as I had R. fuscula hatching much later. Schweibert mentions this insect on p.83.

Dick

Ryacophila on spring?

8 replies

Posted by LittleJ on Nov 4, 2008

Last reply on Nov 8, 2008 by LittleJ

any one know if we have these guys on spring creek(pa) ? I was putting together my box for fri. and realized all I know of spring creek caddis are tan and no grannoms.
thanks
Jeff

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