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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 Zapada cinctipes (Nemouridae) (Tiny Winter Black) Stonefly Nymph from the Yakima River in Washington
Nymphs of this species were fairly common in late-winter kick net samples from the upper Yakima River. Although I could not find a key to species of Zapada nymphs, a revision of the Nemouridae family by Baumann (1975) includes the following helpful sentence: "2 cervical gills on each side of midline, 1 arising inside and 1 outside of lateral cervical sclerites, usually single and elongate, sometimes constricted but with 3 or 4 branches arising beyond gill base in Zapada cinctipes." This specimen clearly has the branches and is within the range of that species.
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 Leptophlebia (Black Quill) Mayfly Spinner Pictures

I collected this specimen along with a female dun of the same species. Unfortunately it's not in very good shape.

After poking at it for a while under a microscope with a good scientific key in hand, I'm pretty sure this is either Leptophlebia cupida or Leptophlebia nebulosa. I can't tell which.

Ruler view of a Female Leptophlebia (Leptophlebiidae) (Black Quill) Mayfly Spinner from Factory Brook in New York The smallest ruler marks are 1 mm.
Lateral view of a Female Leptophlebia (Leptophlebiidae) (Black Quill) Mayfly Spinner from Factory Brook in New York
Female Leptophlebia (Leptophlebiidae) (Black Quill) Mayfly Spinner from Factory Brook in New York
Female Leptophlebia (Leptophlebiidae) (Black Quill) Mayfly Spinner from Factory Brook in New York
Female Leptophlebia (Leptophlebiidae) (Black Quill) Mayfly Spinner from Factory Brook in New York
Ventral view of a Female Leptophlebia (Leptophlebiidae) (Black Quill) Mayfly Spinner from Factory Brook in New York

This mayfly was collected from Factory Brook in New York on May 9th, 2007 and added to Troutnut.com by Troutnut on May 18th, 2007.


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Female Leptophlebia (Black Quill) Mayfly Spinner Pictures

Collection details
Location: Factory Brook, New York
Date: May 9th, 2007
Added to site: May 18th, 2007
Author: Troutnut
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