Fincham, John E, and Peter Nupen. “A Pied Crow Corvus Albus Survey Covering 4 000 Km2 of the Karoo: Autumn 2015”. Biodiversity Observations 7 (February 15, 2016): 1–4. Accessed June 30, 2022. https://journals.uct.ac.za/index.php/BO/article/view/295.