We have had piebald blackbirds in the centre of Dorchester for quite a few years and we have a regular leucistic jackdaw around our house.
The oddest thing I've seen though is a brown Rook in fields to the south of the town. It was not a uniform colour, more reminscent of a hoodies pattern - dark brown and pale fawn. I watched it approach a flock of normal coloured rooks and was waiting for the feathers to fly (I thought at first glance it was a low flying buzzard!). However, very quickly it became obvious that it was not seen as a threat and it landed in amongst its colleagues and proceded to act in a typical rook-like way - stalking over the field and sticking its beak into the ground.
I only saw it the once but did have the opportunity to have a good long look before I had to reluctantly drive on to work. It was good to compare it with its normal-coloured breatren.
Now what would be the term for this colour variation? Chococistic?
