sentences:  In spring, returning birds pass through Mongolia from the end of March and southeasternmost Russia in April and May, reaching their breeding grounds in May, perhaps as late as June in the far north.Vagrant birds have been recorded in Belarus, Kazakhstan, Lebanon and several European countries, as well as in North America.Most North American records have been in western Alaska and British Columbia, but as of February 2018 there had been records of single birds away from the Pacific coast in Alberta, Idaho and Montana.