Common, in places rare breeding migrant. Inhabits river valleys, fishy drift streams, ponds and lakes with clay precipices. On migration occurs on all waters. In spring appears in April – mid-May singly or by pairs, last migrants recorded in end of May – early June. Breeds by separate pairs not close one from another. Nest is located in hole depth to 3 m in clay precipices; hole finishes by the nesting chamber without lining (later there is a layer of eructated fish bones). Both partners excavate hole, incubate clutch for about 20 days and then feed juveniles. Clutch of 4-8 eggs is laid in end of May to mid-July. Fledglings (23-24 days old) recorded in mid-July to mid-August. Probably rears two broods per season. Autumn migration begins in September. Latest birds recorded in early-mid October.
В.К.Рябицев. "Птицы Сибири". Москва-Екатеринбург, Изд-во "Кабинетный ученый", 2014.