Accidental breeding migrant, in places common passage migrant. Inhabits pine, mixed and deciduous forests, on migration visits groves, shelterbelts and shrub thickets. Arrives in early April, latest migrants recorded in end May. No data about breeding biology in Kazakhstan. Breeds in separate pairs. Nest is located in tree holes, cavities of human constructions and in nest boxes; nest is built from dry grass and is lined with thin grass and hair. Clutch of 5-7 eggs is produced in early May – June. Only female incubates, male feed her. Both parents feed juveniles which fledge in June – July. Autumn migration is in August – early September, latest birds recorded in mid-September.
