Yellow Wagtail - motacilla flava

Probably the worst picture I have posted but it has taken me weeks to get it!! I believe this is the femail who must have hatched her chicks. They are nesting above my kitchen window somewhere either in the guttering or a chimney top. I have only seen the male one in his bright yellow colours up until today. He was carrying nesting materials at first and then grubs to feed his partner. Today they were both busy so I am presuming the chicks have hatched. They have visited here for about four years now. I am honoured they chose to visit here to nest and such a strange place too!!! In the city. They will leave soon now the chicks have hatched.