Fincham, J. E., and P. Nupen. “A Pied Crow Corvus Albus Survey Covering 4 000 Km2 of the Karoo: Autumn 2015”. Biodiversity Observations, vol. 7, Feb. 2016, pp. 1-4, https://journals.uct.ac.za/index.php/BO/article/view/295.