In the fall, the starlings congregate in large groups before they migrate. They make quite a racket that you can hear from quite far away. As you can see, this tree was just full of starlings.
Finally, they flew off, albeit in the wrong direction if they were hoping for a warmer clime.
I find the big flocks of starlings kind of creepy. I'd much rather see and hear the cheerful honking of the geese.