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.

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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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.