I am not entirely sure of what these birds are called. Their main physical characteristic is that they have black and white plumage. When search the google search engine through the keywords: ‘black birds with black and white feathers’. The search result was extensive and provided an ample quantity of photographs of black and white feathered birds. The closest image to the bird I was looking for is called Black Billed Magpie. It’s scientific name is Pica Hudsonia. In some sources, they are mentioned as Pica Pica (Linnaeus). The sources also indicate that these birds are usually seen in Western North America. These birds on the photographs are seen in North-Western part of Europe. Is it possible that these birds are migrating? Are they now on a stop-over because they have to rear their young?