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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Tricorythodes (Trico) Mayfly Nymph Tricorythodes (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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Site updates from October 15, 2011

Closeup insects by Entoman from the Fall River in California

Female Brachycentrus americanus (American Grannom) Caddisfly Adult

1 Picture

Female Brachycentrus americanus (Brachycentridae) (American Grannom) Caddisfly Adult from the Fall River in California

Size 11 mm. Prior to this photo the specimen dropped its large egg mass that was a very dark (almost black) olive sphere almost twice the diameter of the abdomen. Notice the abdomen visible through the wings is both thickened and shortened post egg drop.

Collected October 14, 2011 from the Fall River in California

Added by Entoman on October 21, 2011

Collected October 14, 2011 from the Fall River in California and added by Entoman on October 21, 2011