Meléndez-Arteaga, J.; Blanco, J.; Ferreira, P.; Nuttall, R. J.; Oschadleus, H. D.; Underhill, L. G. Red-Billed Oxpecker Buphagus Erythrorhynchus in the KhoiSan Karoo Conservancy, Northern Cape, South Africa. Biodiv. Obs. 2023, 13, 50-60.