White wagtail on the roof

I am not much of a birder and the number of bird species I can identify on sight is probably only about 20. So, I often try to photograph the ones I find interesting and unfamiliar with the hopes of putting a name on them later.

Here is a bird I noticed a couple of weeks ago while vacationing in western Turkey. The longest lens I had with me was 50 mm, but luckily, the bird was not too skittish, so I was able to get a few satisfactory pictures of it. If I'm not mistaken, it is a white wagtail (Motacilla alba). It is stated to be a common species of Europe, Asia and northern Africa.