What gray bird flocks together with 40 to 50?

by JoAnn WC
(Atlanta, GA)

The bird is in Georgia, and looks like a tufted titmouse. It's all gray on the top with a small crest on the head and a light belly. I would say the size is 4".

I would say it is a tufted titmouse except:
there are 40 to 50 flocking together, going from one tree to a nearby tree;
about twice a day they spend time flying to and back from red holly bushes (trees almost);
they don't sound like a tufted titmouse. The sound is like continual and soft but similar to a cricket.

I wish I had a picture for you, but I keep forgetting to bring my camera into the office.