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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.

Sunlight perfectly strikes the trees at a bend in the Foss River in the Washington Cascades. From the Foss River in Washington

Stream photos

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Tricorythodes (Trico) Mayfly NymphTricorythodes (Trico) Mayfly Nymph
Dorsal view of a Tricorythodes (Leptohyphidae) (Trico) Mayfly Nymph from Mystery Creek #308 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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Female Callibaetis undatus (Speckled Dun) Mayfly Spinner Pictures

This mayfly was collected from the Flathead River-lower in Montana on May 26th, 2005 and added to Troutnut.com by Bnewell on June 28th, 2011.


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Female Callibaetis undatus (Speckled Dun) Mayfly Spinner Pictures

Taxonomy
  1. Kingdom Animalia (Animals)
  2. » Phylum Arthropoda (Arthropods)
  3. » Class Insecta (Insects)
  4. » Order Ephemeroptera (Mayflies)
  5. » Family Baetidae (Blue-Winged Olives)
  6. » Genus Callibaetis (Speckled Duns)
  7. » Species undatus (Speckled Duns)
Collection details
Location: Flathead River-lower, Montana
Date: May 26th, 2005
Added to site: June 28th, 2011
Author: Bnewell
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