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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.

The East Fork Big Lost River in Idaho

Stream photos

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Tricorythodes (Trico) Mayfly NymphTricorythodes (Trico) Mayfly Nymph
Dorsal view of a Tricorythodes (Leptohyphidae) (Trico) Mayfly Nymph from Mystery Creek #308 in Washington
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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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