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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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Female Ephemerella aurivillii Mayfly Dun Pictures

This female was collected in proximity to a male that looks like the same species.

Lateral view of a Female Ephemerella aurivillii (Ephemerellidae) Mayfly Dun from the Madison River in Montana
Female Ephemerella aurivillii (Ephemerellidae) Mayfly Dun from the Madison River in Montana
Dorsal view of a Female Ephemerella aurivillii (Ephemerellidae) Mayfly Dun from the Madison River in Montana
Female Ephemerella aurivillii (Ephemerellidae) Mayfly Dun from the Madison River in Montana
Ruler view of a Female Ephemerella aurivillii (Ephemerellidae) Mayfly Dun from the Madison River in Montana The smallest ruler marks are 1 mm.
Ventral view of a Female Ephemerella aurivillii (Ephemerellidae) Mayfly Dun from the Madison River in Montana

This mayfly was collected from the Madison River in Montana on July 1st, 2019 and added to Troutnut.com by Troutnut on July 18th, 2019.


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Female Ephemerella aurivillii Mayfly Dun Pictures

Collection details
Location: Madison River, Montana
Date: July 1st, 2019
Added to site: July 18th, 2019
Author: Troutnut
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