What kind of bird was that, that was chirping at the masters?
According to the internet, there are several different links claiming that the bird sounds were faked by CBS, have been for years, and that CBS has been called out on it, a few years ago.
I am going to say it was the Northern Mockingbird. The Northern Mockingbird can mimic many other birds, so even if you told me it was a Cardinal, or a Dickcissel, or even a Fluffy-backed Tit-Babbler, I am saying it was a Mockingbird imitating those birds.