That got your attention! Slightly out of County, but relevant, well done to local photographer Drew Buckley for getting his Crested Tit (Scotland, naturally) published on the cover of the January edition of Birdwatch magazine:
http://drewbuckleyphotography.com/birdwatch-magazine-january-2013/
On the subject of Nordic Jackdaws, I would agree with Clive - if expert opinion agrees that the well marked collared birds that we are seeing from time to time are of Scandinavian origin, for example the Haverfordwest bird, then it is clear that they can then decide to stay, and I suspect breed locally. The Nordic bird in Haverfordwest was still around early winter at least, and there is another bird with a less distinct collar in the same area...possibly suggesting offspring.