See also:
Pica pica Linnaeus, 1758
Pica pica bactriana Bonaparte, 1850

No Synonyms

Description. White color on the primaries and on the rump is less extensive than in bactriana. The primaries tips (including the tips of the inner webs) are always black. Inner secondaries usually have a dark blue sheen.

Distribution. This subspecies probably breeds in Volga-Ural territory.

References

Gavrilov E. I., Gavrilov A. E. "The Birds of Kazakhstan". Almaty, 2005
Э.И.Гаврилов. "Фауна и распространение птиц Казахстана". Алматы, 1999.