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 specimen keys pretty easily to Onocosmoecus, and it closely resembles a specimen from Alaska which caddis expert Dave Ruiter recognized as this genus. As with that specimen, the only species in the genus documented in this area is Onocosmoecus unicolor, but Dave suggested for that specimen that there might be multiple not-yet-distinguished species under the unicolor umbrella and it would be best to stick with the genus-level ID. I'm doing the same for this one.
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Caddisfly Species Phryganea cinerea (Rush Sedges)
Gary LaFontaine writes in Caddisflies that this species lives up to 300 feet deep in Lake Superior.
Where & when
Preferred waters: Lakes preferred; found in some slow rivers
In 72 records from GBIF, adults of this species have mostly been collected during July (40%), August (31%), and June (25%).
In 48 records from GBIF, this species has been collected at elevations ranging from 10 to 10157 ft, with an average (median) of 1001 ft.
Species Range
Start a Discussion of Phryganea cinerea
References
- LaFontaine, Gary. 1981. Caddisflies. The Lyons Press.
- Swisher, Doug and Carl Richards. 2000. Selective Trout. The Lyons Press.
Caddisfly Species Phryganea cinerea (Rush Sedges)
Species Range
Common Names
Resources
- NatureServe
- Integrated Taxonomic Information System
- Global Biodiversity Information Facility
- Described by Walker (1852)