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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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Cinygmula (Dark Red Quill) Mayfly Nymph Pictures

Unfortunately there's no good key to species of Cinygmula nymphs and I didn't find an adult, so this one will have to stay at genus level.

Dorsal view of a Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Dosewallips River in Washington
Ruler view of a Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Dosewallips River in Washington The smallest ruler marks are 1 mm.
Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Dosewallips River in Washington
Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Dosewallips River in Washington
Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Dosewallips River in Washington
Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Dosewallips River in Washington
Ventral view of a Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the Dosewallips River in Washington

This mayfly was collected from the Dosewallips River in Washington on July 6th, 2020 and added to Troutnut.com by Troutnut on July 12th, 2020.


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Cinygmula (Dark Red Quill) Mayfly Nymph Pictures

Collection details
Location: Dosewallips River, Washington
Date: July 6th, 2020
Added to site: July 12th, 2020
Author: Troutnut
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