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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.

Lateral view of a Male Baetidae (Blue-Winged Olive) Mayfly Dun from Mystery Creek #308 in Washington
This dun emerged from a mature nymph on my desk. Unfortunately its wings didn't perfectly dry out.
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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Female Ephemerella aurivillii Mayfly Dun Pictures

This dun hatched out in my aquarium from this nymph.

Female Ephemerella aurivillii (Ephemerellidae) Mayfly Dun from Nome Creek in Alaska
Lateral view of a Female Ephemerella aurivillii (Ephemerellidae) Mayfly Dun from Nome Creek in Alaska
Dorsal view of a Female Ephemerella aurivillii (Ephemerellidae) Mayfly Dun from Nome Creek in Alaska
Ventral view of a Female Ephemerella aurivillii (Ephemerellidae) Mayfly Dun from Nome Creek in Alaska
Ruler view of a Female Ephemerella aurivillii (Ephemerellidae) Mayfly Dun from Nome Creek in Alaska The smallest ruler marks are 1 mm.

This mayfly was collected from Nome Creek in Alaska on July 10th, 2011 and added to Troutnut.com by Troutnut on July 13th, 2011.


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Female Ephemerella aurivillii Mayfly Dun Pictures

Collection details
Location: Nome Creek, Alaska
Date: July 10th, 2011
Added to site: July 13th, 2011
Author: Troutnut
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