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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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Female Cinygmula ramaleyi (Small Western Gordon Quill) Mayfly Dun Pictures

This dun is almost certainly of the same species as this nymph, as it hatched in my cooler from a nearly identical nymph.

Lateral view of a Female Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) Mayfly Dun from Nome Creek in Alaska
Female Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) Mayfly Dun from Nome Creek in Alaska
Female Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) Mayfly Dun from Nome Creek in Alaska
Female Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) Mayfly Dun from Nome Creek in Alaska
Dorsal view of a Female Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) Mayfly Dun from Nome Creek in Alaska
Ventral view of a Female Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) Mayfly Dun from Nome Creek in Alaska
Ruler view of a Female Cinygmula ramaleyi (Heptageniidae) (Small Western Gordon Quill) 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.

Discussions of this Dun

Cinygmula Dun
5 replies
Posted by Entoman on Jul 15, 2011
Last reply on Jul 17, 2011 by Entoman
Jason -

Looks like a female Cinygmula ramaleyi sub to me (one of many Little Western Red Quills). The other common Western species are larger and/or have different colored/patterned wings. While only three are common (if that word can be used), there are nine species currently listed with a NW distribution, but I don't know about AK. I guess it remains possible to be one of the less common species that may have virtually identical morphology and color.

Kurt

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Female Cinygmula ramaleyi (Small Western Gordon Quill) 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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