I don't like them chirping all night long in a tree right outside my bedroom window. The first night I didn't sleep until it was time to get up. Maybe it has babies in a nest in that tree. If it wanted to disturb my sleep It sure was successful. I think it is the same bird that chases all the neighborhood cats and makes them run from one car to another to keep the bird from pecking them in the head or rear end. When the cat makes a dash for underneath a vehicle the bird has to keep flying and make another try when the cat gets brave to try again to cross the street. I think this bird may be a Mockingbird, but not sure. It has about three tones. It will chirp one way for a while then switch to another, then another. I wonder what those different levels mean or what they are saying. If I didn't have close neighbors I would be tempted to spray up into the tree or shine a flashlight. I'll see if it lets me sleep tonight, if it doesn't I may have to disturb my neighbors while I'm disturbing that loud bird.