Butler, Hennie, and Ordino Kok. “Habitat Preference, Feeding Distance and Flight Direction of Cattle Egrets (Bubulcus Ibis) in the Central Free State.”. Suid-Afrikaans Tydskrif vir Natuurwetenskap en Tegnologie / <i>South African Journal of Science and Technology</i&gt; 26, no. 3 (September 21, 2007): 196-204. Accessed May 1, 2024. http://satnt.ac.za/index.php/satnt/article/view/145.