This is my Friend Walter ... He lives not too far away from me. I whistle a particular tune and he comes and sits about a foot from my knee on my balcony edge. Then he talks to me ... he caws at me. I know what he wants; cat treats but lately I have noticed that when he gets close to me he makes a sound like a hick up. It is a deliberately sound not an accident. Then he looks for me to reply, so I talk to him.
If you watch the Fringe Friday nights on Fox and you know the qualities of "Walter the mad scientist" this bird reminds me of him and hence the name.