This specimen resembled several others of around the same size and perhaps the same species, which were pretty common in my February sample from the upper Yakima. Unfortunately, I misplaced the specimen before I could get it under a microscope for a definitive ID.
Millcreek on Dec 25, 2017December 25th, 2017, 4:26 am EST
These have all been taken from the Russian River within the last month. First from the top are photos of some Baetis tricaudatus and Baetis alius, next are Pteronarcys californica and Isoperla pinta, then a Chimarra sp. and last an Ameletus sp.
"If we knew what it was we were doing, it would not be called research, would it?"