de Swardt, Dawie, and Kozana Aphiwe. “Opportunistic Avian Nectarivory on Flowering Aloe Maculata With a Review of Visiting Bird Species”. Afrotropical Bird Biology: Journal of the Natural History of African Birds 1 (December 13, 2021). Accessed May 28, 2022. https://journals.uct.ac.za/index.php/ABB/article/view/v1_6.