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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.

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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Stonefly Species Doroneuria theodora (Golden Stones)

Species Range

Physical description

Most physical descriptions on Troutnut are direct or slightly edited quotes from the original scientific sources describing or updating the species, although there may be errors in copying them to this website. Such descriptions aren't always definitive, because species often turn out to be more variable than the original describers observed. In some cases, only a single specimen was described! However, they are useful starting points.

Source: Eggs Of Western Nearctic Acroneuriinae (Plecoptera: Perlidae)

Egg. Outline oval with short, narrow collar (Fig. 13). Egg length ca. 530 µm, equatorial width ca. 400 µm, collar length ca. 30 µm , width ca. 60 µm. Chorionic surface coarsely punctate in a band ca. 325 µm wide, extending from near collar (Figs. 14, 16) to smooth opercular band surrounding lid. Lid with obscure, irregularly shaped follicle cell impressions, but punctations absent (Fig.). Micropylar row located on lid; orifices raised, canals obscure (Fig. 15).

Start a Discussion of Doroneuria theodora

Stonefly Species Doroneuria theodora (Golden Stones)

Species Range
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