Black Kites are migratory and spend the winter in Africa south of the Sahara. Some birds can also be seen in southern Europe during the winter though they are not nearly as common as the Red Kite.
Black Kites normally lay 2 or 3 eggs, sometimes 4 (there are very race cases of 5 eggs). The breeding time is on average 32 days and the young stay another 43-49 days in the nest. After fledging, the adults care for the young for 15-36 days until the young can live without their parents.
Additional Information :
Black Kite - animaldiversity.org
Black Kite - Milvus migrans - ebird.org
Black Kite - Facts - life-eurokite.eu