More flotsam blown in by the storm

...or is that jetsam?
Well, it's been fun to learn about the various "xenos" that have popped up in our valley this week with the unsettled weather.  Monday we had sun-rainbow-snow (half an inch)-cloud-sun-wind....which repeated until Wednesday (minus the snow and rainbow).   On Monday night (May 3), just before dark, I heard funny sounds overhead, and looked up to see first one, then another , then a 3rd large (40-50 birds) V of birds passing overhead, heading north.  I got the scope out, but unfortunately, it was too dark to get any plumage details.  But from the sounds and shapes, they were not sandhill cranes.  They also were not Canada (eh?) geese, as the honks were wrong.  It's possible they were cackling, but I think the birds were too large.  I've read that greater white-fronted geese fly in high V formations, and the sounds I heard sound like the recordings I have.   Any other suggestions?  Seems like they'd be a bit late for heading up to Canada, but then again, storms can do strange things.  Anyone up in Tonasket or the Okanogan highlands spot these? 
My rare sighting of the week was Thursday morning (May 6):  4 yellow-headed blackbirds in the pasture at the bottom of our hill (east side of the Methow River, near the Smoke Jumper base).   My goodness, that yellow was brilliant in the early morning sun, and they were quite comical with their twisting bodies as they made their eerie calls.  What a joy!
Meanwhile, on the same morning (May 6), Libby reported 35 Bonaparte's gulls and  lots of shorebirds and waterfowl at Twin Lakes.  Amazing!
What are other folks seeing in their neck of the woods?  Let us know!