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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 Gibbon River in Wyoming

Stream photos

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Limnephilus (Summer Flier Sedge) Caddisfly LarvaLimnephilus (Summer Flier Sedge) Caddisfly Larva
Case view of a Limnephilus (Limnephilidae) (Summer Flier Sedge) Caddisfly Larva from the Yakima River 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 Nemoura (Tiny Winter Blacks)

Where & when

In 41 records from GBIF, adults of this genus have mostly been collected during May (27%), June (27%), July (24%), September (10%), and August (7%).

In 16 records from GBIF, this genus has been collected at elevations ranging from 20 to 6562 ft, with an average (median) of 830 ft.

Genus Range
Map of specific collection sites

Start a Discussion of Nemoura

Stonefly Genus Nemoura (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 Nemoura (Tiny Winter Blacks)
Species in Nemoura
Nemoura arcticaArctic Forestflies
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Nemoura normaniAlaska Forestflies
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Nemoura trispinosaThree-spined Forestflies
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Species in Nemoura: Nemoura arctica, Nemoura normani, Nemoura trispinosa
2 species (Nemoura rickeri and Nemoura spiniloba) aren't included.
Genus Range
Map of specific collection sites
Common Name
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