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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.

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 Genus Taeniopteryx (Early Black Stoneflies)

Several species of early black stoneflies may be important, but Taeniopteryx nivalis is the most common.

Where & when

In 254 records from GBIF, adults of this genus have mostly been collected during March (35%), February (24%), January (20%), April (12%), and December (6%).

In 24 records from GBIF, this genus has been collected at elevations ranging from 180 to 11430 ft, with an average (median) of 2756 ft.

Genus Range

Specimens of the Stonefly Genus Taeniopteryx

5 Nymphs

Start a Discussion of Taeniopteryx

References

Stonefly Genus Taeniopteryx (Early Black Stoneflies)

Taxonomy
Species in Taeniopteryx: Taeniopteryx nivalis
10 species (Taeniopteryx burksi, Taeniopteryx lita, Taeniopteryx lonicera, Taeniopteryx maura, Taeniopteryx metequi, Taeniopteryx nelsoni, Taeniopteryx parvula, Taeniopteryx robinae, Taeniopteryx starki, and Taeniopteryx ugola) aren't included.
Genus Range
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