Smith, Caitlin C D, Les G Underhill, and Michael Brooks. “Bird Distribution Dynamics 13 - the Grebes of South African, Lesotho and Swaziland”. Biodiversity Observations 8 (April 29, 2017): 21: 1 – 14. Accessed December 3, 2022. https://journals.uct.ac.za/index.php/BO/article/view/419.