Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York

Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

Firehole River Sunset

From the Firehole River in Wyoming

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

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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.

Taxon

Lepidostoma (Little Brown Sedge) Caddisfly Larva

12 Pictures

Case view of a Lepidostoma (Lepidostomatidae) (Little Brown Sedge) Caddisfly Larva from Mystery Creek #199 in Washington

Collected July 27, 2019 from Mystery Creek #199 in Washington

Added by Troutnut on July 30, 2019

Collected July 27, 2019 from Mystery Creek #199 in Washington and added by Troutnut on July 30, 2019

Troutnut

Administrator
Bellevue, WA

Posts: 2758

Troutnut on Jul 30, 2019July 30th, 2019, 8:42 am EDT

I ran across [this thread on Roger's site](http://www.flyfishingentomology.com/forum/Replies_Display.php?t=0134) discussing with Kurt the identity of a larva fairly similar to this one. I keyed this one out to Sericostomatidae with the dissecting microscope (although I couldn't really make out the antennae at all), and from there it easily keys to Gumaga. I was uncertain in enough places that I was pleased to get to the end of the key and find cases that perfectly match this specimen.

Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist