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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.
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Drunella cornuta (Large Blue-Winged Olive) Mayfly Nymph Pictures

Drunella cornuta (Ephemerellidae) (Large Blue-Winged Olive) Mayfly Nymph from Eighteenmile Creek in Wisconsin
Ventral view of a Drunella cornuta (Ephemerellidae) (Large Blue-Winged Olive) Mayfly Nymph from Eighteenmile Creek in Wisconsin
Dorsal view of a Drunella cornuta (Ephemerellidae) (Large Blue-Winged Olive) Mayfly Nymph from Eighteenmile Creek in Wisconsin

This mayfly was collected from Eighteenmile Creek in Wisconsin on June 5th, 2005 and added to Troutnut.com by Troutnut on May 24th, 2006.


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Drunella cornuta (Large Blue-Winged Olive) Mayfly Nymph Pictures

Collection details
Location: Eighteenmile Creek, Wisconsin
Date: June 5th, 2005
Added to site: May 24th, 2006
Author: Troutnut
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