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.

Cedar sweepers line the fertile spring creek headwaters of a famous trout stream.

From the Bois Brule River in Wisconsin

Stream photos

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Doroneuria baumanni (Golden Stone) Stonefly Nymph Doroneuria baumanni (Golden Stone) Stonefly Nymph

Dorsal view of a Doroneuria baumanni (Perlidae) (Golden Stone) Stonefly Nymph from Sears Creek in Washington

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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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Another mayfly from Spain: Epeorus sp.

Isidro
Posts: 24

Isidro on Mar 11, 2008March 11th, 2008, 10:50 pm EDT

In this case, I'm completely sure about the genus. In Iberian Peninsula are cited three Epeorus species: E. alpicola, E. sylvicola and E. torrentium. Which one can be this insect?

Flying in small groups above a road, in high mountain, Benasque, Aragon, Spain, in the Pyrenees mountains, at 1400 meters high, in a zone with quick river of clean and cool water, with rocks and stones. All surrounded by pine (Pinus sylvestris) forest. Wingspan: about 25-30 mm.

Shawnny3
Moderator
Pleasant Gap, PA

Posts: 1197

Shawnny3 on Mar 12, 2008March 12th, 2008, 12:15 pm EDT

I can't help you out, but I did want to mention how beautiful that first picture is. What wonderful color you captured.

-Shawn

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

Isidro
Posts: 24

Isidro on Mar 16, 2008March 16th, 2008, 6:24 am EDT

I give it as impossible..??? :-( :-( :-(