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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 Cinygmula (Dark Red Quill) Mayfly Dun Pictures

I'm calling this one Cinygmula just based on the general look and the fact that the genus is very common in this river. Official keys can't rule out other Heptageniidae, though.

Lateral view of a Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun from the South Fork Snoqualmie River in Washington
Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun from the South Fork Snoqualmie River in Washington
Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun from the South Fork Snoqualmie River in Washington
Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun from the South Fork Snoqualmie River in Washington
Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun from the South Fork Snoqualmie River in Washington
Ruler view of a Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun from the South Fork Snoqualmie River in Washington The smallest ruler marks are 1/16".
Ventral view of a Female Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Dun from the South Fork Snoqualmie River in Washington

This mayfly was collected from the South Fork Snoqualmie River in Washington on June 16th, 2018 and added to Troutnut.com by Troutnut on July 3rd, 2018.


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Female Cinygmula (Dark Red Quill) Mayfly Dun Pictures

Collection details
Location: South Fork Snoqualmie River, Washington
Date: June 16th, 2018
Added to site: July 3rd, 2018
Author: Troutnut
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