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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.

Two major forks of this grayling stream come together in this pretty pool. From the Chena River in Alaska

Stream photos

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Perlodidae (Springflies and Yellow Stones) Stonefly NymphPerlodidae (Springflies and Yellow Stones) Stonefly Nymph
Artistic view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.
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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 Species Acroneuria abnormis (Golden Stones)

Where & when

In 64 records from GBIF, adults of this species have mostly been collected during June (45%), July (27%), and May (22%).

In 48 records from GBIF, this species has been collected at elevations ranging from 20 to 10663 ft, with an average (median) of 1743 ft.

Species Range
Map of specific collection sites

Specimens of the Stonefly Species Acroneuria abnormis

3 Nymphs

Start a Discussion of Acroneuria abnormis

Stonefly Species Acroneuria abnormis (Golden Stones)

Taxonomy
  1. Kingdom Animalia (Animals)
  2. » Phylum Arthropoda (Arthropods)
  3. » Class Insecta (Insects)
  4. » Order Plecoptera (Stoneflies)
  5. » Family Perlidae (Golden Stones)
  6. » Genus Acroneuria (Golden Stones)
  7. » Species abnormis (Golden Stones)
Species Range
Map of specific collection sites
Common Names
Resources
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