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.

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Perlodidae (Springflies and Yellow Stones) Stonefly Nymph Perlodidae (Springflies and Yellow Stones) Stonefly Nymph

Artistic view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington

This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.

11 Recently Added Photos

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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Baetisca obesa (Armored Mayfly) Mayfly Nymph Pictures

This is a neat, unusal view into the gills of a Baetisca nymph.

Baetisca obesa (Baetiscidae) (Armored Mayfly) Mayfly Nymph from the Neversink River (above reservoir) in New York

Baetisca obesa (Baetiscidae) (Armored Mayfly) Mayfly Nymph from the Neversink River (above reservoir) in New York

Artistic view of a Baetisca obesa (Baetiscidae) (Armored Mayfly) Mayfly Nymph from the Neversink River (above reservoir) in New York

Ruler view of a Baetisca obesa (Baetiscidae) (Armored Mayfly) Mayfly Nymph from the Neversink River (above reservoir) in New York The smallest ruler marks are 1 mm.

Dorsal view of a Baetisca obesa (Baetiscidae) (Armored Mayfly) Mayfly Nymph from the Neversink River (above reservoir) in New York

This mayfly was collected from the Neversink River (above reservoir) in New York on May 6th, 2007 and added to Troutnut.com by Troutnut on May 10th, 2007.

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