Bill is longer and more slender; upperparts background color is paler, less blackish-brown; the white terminal band on tail feathers is broader than in rothschildi.
Breeds in South-West Altai. Wanderers recorded on Ural valley (from 5 October - 1 November 1956 30 birds recorded, and in October 1963, when 5-10 birds observed each day); in Naurzum Reserve; on Big Aksuat lake; and even in Kurgaldzhino Reserve (11 and 25 September 1971, two birds). Three lean birds obtained at influence of Temir in Emba river (6 September 1963). It noted once on Ustyurt (8 October 1954). On Syrdarya valley near Chiili one bird (from 5 observed) obtained (23 December 1909). No spring movement observed.
Gavrilov E. I., Gavrilov A. E. "The Birds of Kazakhstan". Almaty, 2005. Э.И.Гаврилов. "Фауна и распространение птиц Казахстана". Алматы, 1999. В.К.Рябицев. "Птицы Урала, Приуралья и Западной Сибири". Екатеринбург. Изд-во Уральского университета, 2000.