What happens in the fall and winter is that they roost in mass in large trees in large numbers -- I'm talking tens of thousands of birds.

We tend to get them in our trees in the morning for some reason, and they aren't as active, so it isn't that big of a deal. But a few blocks away they land in the evening and make a lot of noise -- it's almost like car horns.

With the fireworks, they don't aim at them, but almost set them up in a "box" to agitate them. I think the objective is to get them broken up into smaller groups and move off to a less populated area. The freaky thing is the distressed crow noises coming from a PA in the back of the truck.