. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. THE ZOOGEOGRAPHY OF THE SOUTH AFRICAN AVIFAUNA 123 cercus holochlorus), Batis fratrum, Erythrocercus livingstotiei, (Anthus melindae), {A. sokokoensis), {Macronyx aurantigula), Tchagra tchagra, Malaconotus quadri- color, Prionops scopifrons, Lamprotomis corruscus, (Spreo fischeri), {Nectarinia pembae), N. neergaardi, N. veroxii, Anthreptes reichenowi, (A. neglectus), Ploceus subaureus, (P. golcmdi), (Euplectes nigroventris), Hypargos margaritatus Serinus scotops and S. citrinipectus. As I have shown
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. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. THE ZOOGEOGRAPHY OF THE SOUTH AFRICAN AVIFAUNA 123 cercus holochlorus), Batis fratrum, Erythrocercus livingstotiei, (Anthus melindae), {A. sokokoensis), {Macronyx aurantigula), Tchagra tchagra, Malaconotus quadri- color, Prionops scopifrons, Lamprotomis corruscus, (Spreo fischeri), {Nectarinia pembae), N. neergaardi, N. veroxii, Anthreptes reichenowi, (A. neglectus), Ploceus subaureus, (P. golcmdi), (Euplectes nigroventris), Hypargos margaritatus Serinus scotops and S. citrinipectus. As I have shown elsewhere (Winterbottom 1965), there are two centres of species concentration in the East African Coastal District, one in Mozambique and the other opposite Zanzibar and Pemba; though further exploration of the. Map 6. Lines of Maximal Faunal Change, south-east Cape. coastal belt in northern Mozambique may show that this bipolarity is due to imperfect knowledge. The boundary of the South East Coastal District at its southern extremity is based on a map (Map 6) showing the range-limits of 234 species by lc squares. This somewhat rough-and-ready method simplifies an exceedingly complicated pattern. The northward bulge in the boundary between 24° and 27CE. is due to the extension of the distribution of many coastal birds into the lush vegetation of the inland mountains, while Karoo birds infiltrate south in the drier valleys between the ranges. In the square 32-33cS., 26-27cE. this phenomenon is particularly marked, for 125 species find their limits in this square. SOUTH CENTRAL HIGHLANDS DISTRICT Where my proposals differ most radically from those of previous workers is in the extent of the South Central Highlands District. Benson & Irwin (1966), in their fine paper on the Brachystegia avifauna, tentatively suggest that the whole extent of this woodland might be regarded as forming a zoogeographical unit, which would fuse Chapin's Rhodesian Highlands and his East African Hig