Their vocalisations have been very obvious and I must admit I had not bothered to take notice before. Young in the nest produce a very high pitched strident call which an sound a bit like a group of parakeets in the distance. Once they have fledged they do sound more like the adults. It is stimulating what you can learn from a common bird when you spend a lot of time watching them.
What has been depressing is to hear of news that Natural England are dealing with requests to shoot Buzzards to protect commercially reared pheasant poults and Red Kites at an RAF base.