López Gómez, M., Underhill, L. G., & Brooks, M. (2017). Bird distribution dynamics 14 - Pied Avocet Recurvirostra avosetta and Black-winged Stilt Himantopus himantopus in South Africa, Lesotho and Swaziland . Biodiversity Observations, 8, 23: 1 – 10. Retrieved from https://journals.uct.ac.za/index.php/BO/article/view/421