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.

A beautiful braided reach of the Sag River, with the Philip Smith Mountains in the Arctic National Wildlife Refuge (ANWR) in the background.

From the Sagavanirktok River in Alaska

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.

Baetis (Blue-Winged Olive) Mayfly Nymph Pictures

Baetis (Baetidae) (Blue-Winged Olive) Mayfly Nymph from Mongaup Creek in New York

Ruler view of a Baetis (Baetidae) (Blue-Winged Olive) Mayfly Nymph from Mongaup Creek in New York The smallest ruler marks are 1 mm.

Ventral view of a Baetis (Baetidae) (Blue-Winged Olive) Mayfly Nymph from Mongaup Creek in New York

Dorsal view of a Baetis (Baetidae) (Blue-Winged Olive) Mayfly Nymph from Mongaup Creek in New York

This mayfly was collected from Mongaup Creek in New York on May 6th, 2007 and added to Troutnut.com by Troutnut on May 18th, 2007.

Discussions of this Nymph

Trailing shuck

1 replies

Posted by Sare on Mar 23, 2016

Last reply on Mar 23, 2016 by Martinlf

I may be nieve but when it comes to trailing shucks I use what ever color poly or antron that's handy.
The Trout don't seem to care.

Trailing Shuck

1 replies

Posted by Baetis7 on Aug 20, 2014

Last reply on Aug 20, 2014 by Entoman

I have noticed a good amount of baetis nymph shucks tied with an orange antron or similar material. What do you folks think about the right color for a shuck?

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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.