You have to understand that any kind of reaction to the annoying noise is drama for him, you need to just say and do nothing to the ones you want to lessen, just think about it, any kind of reaction whether it is vocal, physical or anything it is entertainment and cause for him to continue, just make no reaction at all. I know this is hard to do but it must be done if you want him to do it less and he will, he may not stop it completely but it will be less and less. Always encourage what you want to continue to hear him say.
You will continue to see changes in his personality as he unpacks and settles in but he is a bird and he is doing what birds do.