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.

Stream photos

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Epeorus albertae (Pink Lady) Mayfly Nymph Epeorus albertae (Pink Lady) Mayfly Nymph

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.

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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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Baetis nymphs (real ones)

Shawnny3 has attached this picture. The message is below.

Shawnny3
Moderator
Pleasant Gap, PA

Posts: 1197

Shawnny3 on Jul 1, 2012July 1st, 2012, 6:38 pm EDT

I seined several nymphs in the drift tonight, but all of them hatched within minutes. If I got one into my vial, by the time I put another one in there, the previous one was ready to get back out. Maybe next time I'll take a vial of rubbing alcohol to dissuade them from hatching.

I got these three guys from kicking over some rocks. I can't verify that they are the same ones that were hatching today - I just picked ones that were most similar to those I saw actually hatch. I think a few of them actually did begin to hatch in the vial but didn't make it, so they might just be the same species as the ones producing the duns on the stream.

Also, notice how much better the pic is. I thought the photos I'd been sharing with you guys were taken with my wife's good macro lens, but I was mistaken (shows you how much I know about cameras). From now on, I think it should be easier to see detail in the images I post.

-Shawn

Jewelry-Quality Artistic Salmon Flies, by Shawn Davis
www.davisflydesigns.com