He didn't sing for me yesterday, but I know people who heard him on Saturday afternoon.
I've listened to recordings of them before, and thought it wasn't a very distinctive song. In a way it's not, but at the same time it's very recognizable once you've heard it. Reuven nailed it with "uncreative mockingbird". It's really quite remarkable how similar they are to mockingbirds in appearance, voice, and behaviour (aside from diet of course :wink: ).
BB