Brown, CJ, PA Bridgeford, SG Braine, M Paxton, and W Versfeld. 2015. “Breeding Data on the Birds of Namibia: Laying Months, Colony and Clutch Sizes and Egg Measurements”. Biodiversity Observations, September, 92-196. https://journals.uct.ac.za/index.php/BO/article/view/284.