sentences:  Black harriers are migratory birds and their annual movements cover the southern half of the land surface of South Africa (including Lesotho) however, there is great individual variability.The majority of these birds undertake an unusual west–east migration.They begin from their breeding areas in south-western South Africa and migrate towards the Eastern Cape, the south-west region of Kwa-Zulu Natal, the south-west region of Mpumalanga and the north-east region of Lesotho during the summer months.