The Birds

We have this flock of birds living in our neighborhood. Flock feels like an insufficient word. It’s more like a horde. There are hundreds of them, and they descend upon our yard en mass, with great swoosh and fluttering. As soon as they sense movement, they’re off again, all of them whooshing up into the trees.

I’m not much of a bird watcher. Anyone know what these things are? My best guess is some kind of blackbird.