The subspecies M. s. sibirica breeds in south-east Siberia westward to beyond Lake Baikal as well as in Mongolia, north-east China, North Korea and Japan (Hokkaidō and northern Honshū). M. s. rothschildi breeds in western China and Myanmar. M. s. gulmergi occurs from Afghanistan to Kashmir with M. s. cacabata from the eastern Himalayas to south-east Tibet and perhaps Myanmar.