Noisy Birdie

This chap sat on the highest branch of our old polarded walnut tree and shouted alarm bells to every other bird that wandered on to the lawn while our cats were lurking. He must be the gate keeper, the watchman, the point guard... anyway he took his job very seriously and it made me go out and have a good look at him. He squawked a lot when I turned up, so obviously I am also a threat.
He is not the prettiest of birds but he is amongst our locals, the noisiest.