KOESLAG, A. Black Sparrowhawk lost battle against Egyptian Geese. Biodiversity Observations, [S. l.], p. 44–45, 2012. DOI: 10.15641/bo.140. Disponível em: https://journals.uct.ac.za/index.php/BO/article/view/140. Acesso em: 3 nov. 2025.