López Gómez, M., Underhill, L.G. and Brooks, M. 2017. Bird distribution dynamics 14 - Pied Avocet <i>Recurvirostra avosetta</i> and Black-winged Stilt <i>Himantopus himantopus</i> in South Africa, Lesotho and Swaziland . Biodiversity Observations. 8, (May 2017), 23: 1 – 10.