Next, someone will be telling me that they've found Sasquatch. I was over on the South Sound this week, and found this insect shuck floating on the water. We were within perhaps 100 yards of a good sized stream emptying into the bay, on grassy flats extending out into the salt, with acres of mudflats all around during low tide (we were there on a high). It sure looks a lot like a giant stonefly, but that's not something I would expect to find where we were. For scale, that Buff logo is about 1" on the long axis.