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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

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 Amphinemura varshava (Tiny Winter Blacks)

Where & when

In 20 records from GBIF, adults of this species have mostly been collected during April (55%) and May (40%).

In 5 records from GBIF, this species has been collected at elevations ranging from 480 to 3264 ft, with an average (median) of 3084 ft.

Species Range

Start a Discussion of Amphinemura varshava

Stonefly Species Amphinemura varshava (Tiny Winter Blacks)

Taxonomy
Species Range
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