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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 Epeorus albertae (Heptageniidae) (Pink Lady) Mayfly Nymph from the East Fork Issaquah Creek in Washington
This specimen keys to the Epeorus albertae group of species. Of the five species in that group, the two known in Washington state are Epeorus albertae and Epeorus dulciana. Of the two, albertae has been collected in vastly more locations in Washington than dulciana, suggesting it is far more common. On that basis alone I'm tentatively putting this nymph in albertae, with the large caveat that there's no real information to rule out dulciana.
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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Report at a Glance

General RegionLittleton, CO
Specific LocationWaterton Canyon
Dates Fished9/9/06
Time of Day7a-11a
Fish CaughtSeveral small raindows an a 13" brown
Conditions & HatchesThe flow was at 65.9, and the clarity was decent. No big hatches, there where spotty midge hatches and I noticed some Baetis later when it clouded up.

Details and Discussion

Sundula
Littleton, Colorado

Posts: 35
Sundula on Sep 10, 2006September 10th, 2006, 6:26 pm EDT
Effective Flies:
Mercury RS2 #22, Mercury Black Beauty #24, Pheasent Tail #20.
The rainbows where holdiing in the well oxygenated pools and the brown was in a deeper riffle

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