Gaglio, Davide, and Richard B Sherley. “Nasty Neighborhood: Kleptoparasitism and a Egg Predation of Swift Terns by Hartlaub’s Gulls”. Biodiversity Observations (May 11, 2014): 131–134. Accessed July 4, 2025. https://journals.uct.ac.za/index.php/BO/article/view/229.