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Blue-winged Olives

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.

Updates from May 23, 2007

Closeup insects by Troutnut from Miscellaneous New York, the Little Juniata River, and the Neversink River in New York and Pennsylvania

Female Stenonema ithaca (Light Cahill) Mayfly Dun
This female looks very much like a male I collected a few hundred miles away a few days later, so I'm guessing it's the same species, which I believe is Maccaffertium mediopunctatum.
Female Baetisca obesa (Armored Mayfly) Mayfly Dun
This Baetisca obesa dun hatched out in my aquarium from nymphs collected a couple weeks earlier.
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