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 to the Epeorus albertae group of species. Of the five species in that group, the two known in Washington state are Epeorus albertae and Epeorus dulciana. Of the two, albertae has been collected in vastly more locations in Washington than dulciana, suggesting it is far more common. On that basis alone I'm tentatively putting this nymph in albertae, with the large caveat that there's no real information to rule out dulciana.
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Millcreek on Oct 23, 2015October 23rd, 2015, 5:16 pm EDT
These two Rhyacophila species were collected from Mill Creek, a tributary of the Russian River. The first is probably a member of the Rhyacophila hyalinata group and the second is probably a member of the Rhyacophila betteni group.
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
-Albert Einstein
Taxon on Oct 23, 2015October 23rd, 2015, 9:21 pm EDT
Very interesting and instructive photos, Mark. Thanks for sharing.
Millcreek on Oct 24, 2015October 24th, 2015, 6:53 am EDT
Glad you enjoyed them, Roger.
Mark
Mark
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
-Albert Einstein