Fish flies is what we were told they were. Paddling 340 miles down the river I bet I ingested 30,000 of those things, skipped two meals because of it. Not bad in the day, but at dusk, night, and just before daylight they were so dense in places that my head, arms, and torso was literally covered by the time I exited a cloud of them. No bites, but irritating all the same. Several times I had to close my eyes or look down and just watch the gps with squinted eyes and paddle like mad until I was out of them. The river rats they had working the safety boats said it is the worst hatch they could remember.
The best way to get to where you want to be in the future is to act like you are there TODAY.