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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 Pycnopsyche guttifera (Limnephilidae) (Great Autumn Brown Sedge) Caddisfly Larva from the Yakima River in Washington
This specimen appears to be of the same species as this one collected in the same spot two months earlier. The identification of both is tentative. This one suffered some physical damage before being photographed, too, so the colors aren't totally natural. I was mostly photographing it to test out some new camera setting idea, which worked really well for a couple of closeups.
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 Callibaetis (Speckled Dun) Mayfly Spinner Pictures

Lateral view of a Female Callibaetis (Baetidae) (Speckled Dun) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
Female Callibaetis (Baetidae) (Speckled Dun) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
Ventral view of a Female Callibaetis (Baetidae) (Speckled Dun) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
Each ruler mark is 1/16 inch.

Ruler view of a Female Callibaetis (Baetidae) (Speckled Dun) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho The smallest ruler marks are 1/16".

This mayfly was collected from the Henry's Fork of the Snake River in Idaho on August 11th, 2018 and added to Troutnut.com by Troutnut on June 12th, 2019.


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Female Callibaetis (Speckled Dun) Mayfly Spinner Pictures

Collection details
Location: Henry's Fork of the Snake River, Idaho
Date: August 11th, 2018
Added to site: June 12th, 2019
Author: Troutnut
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