sentences:  The black harrier population has declined in recent years to fewer than 1000 birds, and it is now considered endangered in South Africa, Lesotho and Namibia.This is due to the destruction of its original breeding habitat, South Africa's natural shrubland, the fynbos, which has been greatly reduced by encroaching cereal culture and urban expansion as well as the invasion of alien plant species.Because of this, the black harriers have been displaced from their lowland Renosterveld and Fynbos habitats into a more montane habitat which unlike the Renosterveld and Fynbos is not characterised by foraging and nesting opportunities.