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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 Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington
This species was fairly abundant in a February sample of the upper Yakima.
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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Heptagenia pulla (Golden Dun) Mayfly Nymph Pictures

I used a microscope to positively identify this nymph as Heptagenia pulla. (Edit six years later: I wish I had explained why I was positive about this. It may have been based on color patterns in an angling text, which are not especially reliable for species ID anymore.)

Lateral view of a Heptagenia pulla (Heptageniidae) (Golden Dun) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin
Ventral view of a Heptagenia pulla (Heptageniidae) (Golden Dun) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin
Heptagenia pulla (Heptageniidae) (Golden Dun) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin
Heptagenia pulla (Heptageniidae) (Golden Dun) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin
Heptagenia pulla (Heptageniidae) (Golden Dun) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin

This mayfly was collected from the Long Lake Branch of the White River in Wisconsin on June 5th, 2005 and added to Troutnut.com by Troutnut on May 25th, 2006.


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Heptagenia pulla (Golden Dun) Mayfly Nymph Pictures

Collection details
Location: Long Lake Branch of the White River, Wisconsin
Date: June 5th, 2005
Added to site: May 25th, 2006
Author: Troutnut
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