Not sure if there is a collective name for a group of starlings? Anyway, I have a "squabble of starlings" fighting on the fat ball holders at my back door. There must be at least 20 young starlings and what a racket they make; great to see though.
I've always known it as 'murmuration' for a flock of starlings in flight before roosting, and a 'chattering' once they've gone to roost, but haven't yet shut up!