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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.

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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Ephemerella aurivillii Mayfly Nymph Pictures

Examination of this specimen under a microscope revealed that it does have small abdominal tubercles, 2-banded femora, and banded tails.

This mayfly was collected from unknown in Wisconsin on February 5th, 2004 and added to Troutnut.com by Troutnut on January 25th, 2006.


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Ephemerella aurivillii Mayfly Nymph Pictures

Collection details
Location: unknown, Wisconsin
Date: February 5th, 2004
Added to site: January 25th, 2006
Author: Troutnut
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