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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 Amphinemura (Tiny Winter Blacks)

Where & when

In 96 records from GBIF, adults of this genus have mostly been collected during May (36%), April (27%), and June (26%).

In 9 records from GBIF, this genus has been collected at elevations ranging from 480 to 3264 ft, with an average (median) of 2917 ft.

Genus Range

Specimens of the Stonefly Genus Amphinemura

1 Female Adult

Start a Discussion of Amphinemura

Stonefly Genus Amphinemura (Tiny Winter Blacks)

Taxonomy
Species in Amphinemura: Amphinemura varshava
15 species (Amphinemura alabama, Amphinemura apache, Amphinemura appalachia, Amphinemura banksi, Amphinemura delosa, Amphinemura linda, Amphinemura mexicana, Amphinemura mockfordi, Amphinemura mogollonica, Amphinemura nigritta, Amphinemura puebla, Amphinemura reinerti, Amphinemura texana, Amphinemura venusta, and Amphinemura wui) aren't included.
Genus Range
Common Name
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