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UPDATE; The sun is shining today, s/he sat, first thing, basking on the roof of a lean-to shed very still. I am sure the astonishing little brain was working out calculations of time and space for which we humans would need computers, and maybe more. S/he has departed, and is no doubt homeward bound.
The idea that any owner would want to "wring it's neck" is quite ludicrous. It was blown off it's course in an extremely violent storm that no bird would wish to fly in. If it now finds home again it will have demonstrated what a even better bird it is for its initiative. I feel humbled to have played a minor part it this 4-day adventure. :0)