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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

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.

Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington
This species was fairly abundant in a February sample of the upper Yakima.
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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True Fly Family Dixidae

Larva & pupa biology

The larvae live and feed in the surface film. This explains why the one I collected and photographed was difficult to keep below the water for clear photos... it really wanted to ride up in the film.

Specimens of the True Fly Family Dixidae

1 Pupa
1 Larva

Start a Discussion of Dixidae

True Fly Family Dixidae

Genus in Dixidae
Genus in Dixidae: Dixa
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