Very rare breeding migrant. Inhabits mountain rocky forests and cliffs near rivers and lakes on altitudes up to 1500 m on Altai. In spring appears in April the latest birds recorded in May. The nest is built in the rock holes or on the ground under the stone (shallow depression lined with grass); sometimes on trees in old nests of crows and other large birds. Breeds in separate pairs, at least 3-5 km apart. Clutches of 3-4 eggs is in April – May. Female incubates for 28-30 days, male brings the food to it. Chicks are born in June – July. Both parent feed nestlings. The autumn migration begins in the end of August, most migrants were registered in September and October.
В.К.Рябицев. "Птицы Сибири". Москва-Екатеринбург, Изд-во "Кабинетный ученый", 2014.
