I can remember my son - he was about 5 at the time come running into the house to tell us exactly the same thing. We obviously didn't believe him. In fact my wife was talking to her mum on the phone at the two of them had a good laugh about it. We thought that Julian was either trying to trick us or that he'd just mis-identified a common bird. In the end though, he was so insistent, we had to go ouside - then we had to eat humble pie because it was true - in Bromley ! There was a sort of mini farm down the road and it had gone AWOL. I don't know if they got it back because it carried on fluttering from roof to roof and off into the distance.