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.

Stream photos

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Amphizoa Beetle Larva Amphizoa Beetle Larva

Dorsal view of a Amphizoa (Amphizoidae) Beetle Larva from Sears Creek in Washington

This is the first of it's family I've seen, collected from a tiny, fishless stream in the Cascades. The three species of this genus all live in the Northwest and are predators that primarily eat stonefly nymphs Merritt R.W., Cummins, K.W., and Berg, M.B. (2019).

5 Recently Added Photos

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.

Female Theliopsyche (Little Brown Sedge) Caddisfly Adult Pictures

This one has a neat iridescent sheen to its wings.

See the discussion for details on this fly's tentative ID.

Ruler view of a Female Theliopsyche (Lepidostomatidae) (Little Brown Sedge) Caddisfly Adult from Mystery Creek #42 in Pennsylvania The smallest ruler marks are 1 mm.

Dorsal view of a Female Theliopsyche (Lepidostomatidae) (Little Brown Sedge) Caddisfly Adult from Mystery Creek #42 in Pennsylvania

Ventral view of a Female Theliopsyche (Lepidostomatidae) (Little Brown Sedge) Caddisfly Adult from Mystery Creek #42 in Pennsylvania

Lateral view of a Female Theliopsyche (Lepidostomatidae) (Little Brown Sedge) Caddisfly Adult from Mystery Creek #42 in Pennsylvania

Female Theliopsyche (Lepidostomatidae) (Little Brown Sedge) Caddisfly Adult from Mystery Creek #42 in Pennsylvania

This caddisfly was collected from Mystery Creek #42 in Pennsylvania on May 28th, 2007 and added to Troutnut.com by Troutnut on June 4th, 2007.

Discussions of this Adult

Chimarra

11 replies

Posted by Taxon on Jun 5, 2007

Last reply on Dec 31, 2007 by Taxon

Jason-

That would be Chimarra, most likely C. aterrima, but it could also be either C. obscura or C. socia. Based on that neat black egg mass visible in the ventral view photo, it would also appear that it's a female.

Start a Discussion of Adult

References

Merritt R.W., Cummins, K.W., and Berg, M.B. 2019. An Introduction to the Aquatic Insects of North America (Fifth Edition). Kendall/Hunt Publishing Company.