The male bird is in his finest clerical black and white.
The female is similarly coloured but with a grey back.
The pied wagtail (Motacilla alba yarrellii) is a fairly common bird with about 1m birds in the UK in the summer.
Pied wagtails tend to move south in the winter and some migrate to Europe or even North Africa.
Listen to the BBC Radio 4 Tweet of the Day on pied wagtail here.