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.

Psephenus (Water Penny) Beetle Larva Pictures

Every picture of this Psephenidae larva was taken with my old C740UZ through a microscope.

Dorsal view of a Psephenus (Psephenidae) (Water Penny) Beetle Larva from Fall Creek in New York

Ventral view of a Psephenus (Psephenidae) (Water Penny) Beetle Larva from Fall Creek in New York

Psephenus (Psephenidae) (Water Penny) Beetle Larva from Fall Creek in New York

This beetle was collected from Fall Creek in New York on November 15th, 2004 and added to Troutnut.com by Troutnut on April 12th, 2006.

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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.