Branfield, Andy. “Vocalizations of European Honey Buzzards (<i>Pernis apivorus</I>) in Southern Africa”. Afrotropical Bird Biology:<br /> Journal of the Natural History of African Birds 1 (September 20, 2021). Accessed November 21, 2024. https://journals.uct.ac.za/index.php/ABB/article/view/v1_2.