This mayfly was collected from the South Fork Snoqualmie River on June 22nd, 2017 and added to Troutnut.com on June 23rd, 2017.
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Second opinions on this one's ID? 3 Replies » Reply
I tentatively keyed it out to Rhithrogena morrisoni
based on Needham's Biology of Mayflies
, but I'm not completely sure. Roger's website lists Rhithrogena
emerging in Washington in March and April
, and this one was collected June 22nd. But this did come from high up in a mountain stream after a year of very heavy snowpack, so it might be that far behind schedule. It also looks very much like the specimen Bob Newell posted
from eastern Washington. What do Roger and others think?
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