See also:
Bubo bubo Linnaeus, 1758
Bubo bubo ruthenus Zhitlov et Buturlin, 1906
Bubo bubo hemachalanus Hume, 1873

Synonyms

Bubo bubo eversmanni Dementiev, 1931
Bubo bubo gladkovi Zaletaev, 1962

Description. Background colour is pale, yellowish-buff. Dark pattern on upper- and underparts is paler, less espressed and more shattered than in interpositus. Dark longitudinal pattern on underparts is not covered to belly. Male wing length 420-468, female 470-492 mm.

Distribution. Breeds from southern part of Volga-Ural area eastward to Zaysan lake and headwaters of Irtysh river, in south up to Ustyurt, lower reaches of Syrdarya and Northern Trans-Balkhash area.

References

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