He disappears each July, presumably to moult. This summer he was gone for seven weeks - the longest period yet - and I thought he might not return. However, he did eventually turn up and even still had his tail feathers, although they fell out the next day. For a while he looked a bit like a rather scruffy exotic chicken although I wouldn't say that to his face.
While he was moulting he was keen on taking dust baths in the kitchen garden, presumably to get rid of the itching.
When you see him in this stance you can see how he might be descended from a Tyrannosaurus or Velociraptor.