If I lean slightly to the left, I can look out of the window by the computer and see what's going on at the bird table - at least in Autumn and Winter I can. During the warmer months, catering for our feathered friends ceases and they can feed themselves by more traditional means. In the last year or so one of our common visitors to the bird table has been a little less than common, for we have a local white blackbird. He (I think he) isn't all that rare nor is he completely white - a small surf will soon google up plenty of them. White blackbirds aren't albinos nor are they a case of leucism (reduced pigment - which does happen and produces a fawn coloured blackbird) but are just a bit of a genetic mutation.
The more usual candidates for the bird table - starlings and, for the observant, a sparrow with his head buried in the feeder at the bottom of the picture.
Down by the site of the original castle in Kirkcudbright there is a blackbird which has just a little bit of white colouration around his neck.
And just because she'd brown and not a little bit mutated, there's no reason why Mrs Blackbird shouldn't get a picture.