Okay, not to sound like a paranoid delusionist, but the most bizarre flippin' thing happened here about an hour, maybe hour and a half ago.
I work from home, and I was sitting here doing my job and all of a sudden heard this unbelievable screeching noise from outside. There is a feral cat in the neighborhood that I have seen in my yard once or twice in the last month, and I was worried he'd gotten to one of my chickens so I went running out the back door like my hair was on fire. My girls were all standing in the yard perfectly still but looking up (as they do if a hawk is going by), and it became immediately obvious what it was.
All of a sudden, all at once out of NOWHERE, about 200 crows showed up on my small city block. I looked around my back yard, and there was not a tree within eye-shot of my back porch that didn't have at least 5-10 crows sitting there, crowing. There were birds in the air still approaching/landing in the trees and on the phone/electrical lines and just all screeching at once. I went out the front door, and they were all on my block... at least a few hundred. Screeching. Nonstop, for about 15-20 minutes. Then as quickly as they had shown up... *poof*... they were gone. None of them fell out of the sky dead, but it was the most bizarre thing I'd ever seen.
Two stayed behind and hung out on the powerlines outside my house and screeched for an additional 5 minutes or so after the rest of them left, but then they took off, too.
Now it is as still and quiet out there as if it hadn't happened.
I do have to say, though, that this was probably a natural migration.... it only SEEMS bizarre because of what has been happening this past week.