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Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana
Salmonflies
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

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.
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.

Dorsal view of a Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from Mystery Creek #62 in New York
HELENE
Posts: 1
HELENE on Oct 10, 2007October 10th, 2007, 1:37 am EDT
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
Taxon
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Site Editor
Plano, TX

Posts: 1311
Taxon on Oct 10, 2007October 10th, 2007, 4:09 am EDT
Helene-

Caddisfly larvae are generally classified as net spinning, free living, or case building. The netspinners build a retreat incorporating a silken net to capture food, similar to a spider web, only underwater. The freeliving build no shelter. The casebuilders build either a portable or fixed case for their protection.

A species which builds cases generally constructs them so similarly, that a case can often be identified to genus level simply by virtue of its shape and the materials used in its construction.
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com
Sayfu
Posts: 560
Sayfu on Aug 9, 2012August 9th, 2012, 9:16 am EDT

Does that have to be Rhyacophila because the larva is green. Dave Hughes calls hydropsyche larva, (spotted sedge) green rock worms as well. Or has that been keyed out further?
PaulRoberts
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Colorado

Posts: 1776
PaulRoberts on Aug 9, 2012August 9th, 2012, 10:58 am EDT
Hydro's are quite different looking. They have notable gills along the underside of the abdomen. Many Rhyaco's have that brilliant blue-green coloration. Hydro's are normally duller in color, usually tan to olive, although some can be a fairly bright green.

That's the trouble with common names. In this case "green rock worm" is a good description, but unfortunately for many critters.
Sayfu
Posts: 560
Sayfu on Aug 9, 2012August 9th, 2012, 12:28 pm EDT

Thanks Paul.

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