Header image
Enter a name
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.

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).
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.

Landscape & scenery photos from Green Lake Outlet

Green Lake Outlet in Idaho
Green Lake Outlet in Idaho
Green Lake Outlet in Idaho

Closeup insects by Troutnut from Green Lake Outlet in Idaho

6
Ameletus (Brown Dun) Mayfly Nymph
Dorsal view of a Ameletus (Ameletidae) (Brown Dun) Mayfly Nymph from Green Lake Outlet in Idaho
5
Baetis bicaudatus (BWO) Mayfly Nymph
The J-shaped light mark on the first femur and L-shaped marks on the next two are telltale signs of Baetis bicaudatus according to the original species description.

Dorsal view of a Baetis bicaudatus (Baetidae) (BWO) Mayfly Nymph from Green Lake Outlet in Idaho

References

Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy