Following the recommendation of OSME and various other references, the EBRC has decided to split the Isabelline Shrike complex into the following two species:
Daurian Shrike Lanius isabellinus
Daurian Shrike L. isabellinus isabellinus thought to be the ocurring subspecies.
Common migrant and winter visitor, October to April, scarce other months.
Chinese Shrike L. (isabellinus) tsaidamensis not reliably reported.
Turkestan Shrike Lanius phoenicuroides
Common migrant, March to early May and September to mid-November; scarce other months.