Bird ID thread

[Johnnytheboy]

What bird did I just see walking down the road outside my house in Dorset?

Brown, between pigeon and duck in size.

Rather of the appearance of a skinny game bird.

Distinctive feature (and this is what I can't match) was a very upright black and bit of white tail feather display.

[Johnnytheboy]

No, not as exotically colourful as that - though I suppose it could be the hen of a species. But the tail was dagger straight, vertical and ~6 inches long. That is the bit I can't correlate with anything!