Oddly I was aware of the error but asking for 'bird watchers' was only ever going to encourage the more mischievous members to clutter up the thread with their irrelevant, (on this occasion), fantasies.
I also considered Ornithologist but I wasn't looking for an expert, just someone who knows what they were talking about.
CLEARLY I SUCCEEDED.
So I'd like to thank everyone for their advice and information.
Most illuminating and VERY educational.
If it's going to be a regular visitor, I'm going to have to decide what to do about things like the nesting boxes and bird table I have in the garden, but I'll worry about that if it becomes necessary.
We had one a few years ago ( Bh220bu ) .
It obliterated a Blackbird .
Not seen it since .