By M.Nishimura (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
Asia. Central Russia eastwards to the Sea of Okhotsk with a southerly movement to eastern China and Japan in the non-breeding period
Least Concern
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