The white wagtail (Motacilla alba)
It’s a quite usual and ordinary bird for Siberia. In very old times, she was called the “ice breaker,” because she appeared just when spring came and ice cracked on the rivers, moreover, hers manner of shaking tail contributed to this.
In these photos you see a young bird, which is rather strange. These photos were taken by me in October, and this is already a rather late date, and almost all the wagtails migrated to warm countries. Most likely, such late birds are associated with the second clutch of their parents. Some birds lay eggs twice a year, but summer is short in Siberia, and usually eggs hatch once, but as you can see, there are exceptions.