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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.

A trackless paradise two days deep in the Yellowstone backcountry From Mystery Creek # 218 in Wyoming

Stream photos

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Sweltsa (Sallfly) Stonefly NymphSweltsa (Sallfly) Stonefly Nymph
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.
10 Recently Added Photos
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 Prostoia (Tiny Winter Blacks)

Where & when

In 86 records from GBIF, adults of this genus have been collected during April (35%), March (30%), May (20%), February (9%), and June (6%).

In 11 records from GBIF, this genus has been collected at elevations ranging from 20 to 10007 ft, with an average (median) of 499 ft.

Genus Range
Map of specific collection sites

Specimens of the Stonefly Genus Prostoia

1 Nymph
Prostoia (Tiny Winter Black) Stonefly Nymph
6 Pictures
Dorsal view of a Prostoia (Nemouridae) (Tiny Winter Black) Stonefly Nymph from Salmon Creek in New York
Added by Troutnut on April 7, 2006
Collected March 28, 2006 from Salmon Creek in New York and added by Troutnut on April 7, 2006

Start a Discussion of Prostoia

Stonefly Genus Prostoia (Tiny Winter Blacks)

Taxonomy
  1. Kingdom Animalia (Animals)
  2. » Phylum Arthropoda (Arthropods)
  3. » Class Insecta (Insects)
  4. » Order Plecoptera (Stoneflies)
  5. » Family Nemouridae (Forestflies)
  6. » Genus Prostoia (Tiny Winter Blacks)
Species in Prostoia
Prostoia completaCentral Forestflies
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Species in Prostoia: Prostoia completa
3 species (Prostoia besametsa, Prostoia hallasi, and Prostoia similis) aren't included.
Genus Range
Map of specific collection sites
Common Name
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