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.
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This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.
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Caddisfly Species Rhyacophila angelita (Green Sedges)
Where & when
This transcontinental species, like Rhithrogena brunnea, is far more abundant in the West than elsewhere.In 48 records from GBIF, adults of this species have mostly been collected during August (44%), September (17%), October (13%), July (8%), June (8%), and May (6%).
In 41 records from GBIF, this species has been collected at elevations ranging from 10 to 10466 ft, with an average (median) of 8022 ft.
Species Range
Egg-Laying behavior
Time of day: Evening
Larva & pupa biology
Current speed: Fast
Environmental tolerance: Prefers clear water
Start a Discussion of Rhyacophila angelita
References
- LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.
Caddisfly Species Rhyacophila angelita (Green Sedges)
Species Range
Common Names
Resources
- NatureServe
- Integrated Taxonomic Information System
- Global Biodiversity Information Facility
- Described by Banks (1911)