The spatial distribution of suitable nest sites is a limiting resource for many colonial breeding animals. Therefore, we investigated and mapped the spatial distribution of nests of Sociable Weaver (Philetairus socius) to evaluate whether the size and distribution of suitable nesting trees influences the variability of colony size and spatial distribution of colonies in two study sites in the Kalahari, South Africa. Keywords: Sociable weaver, Philetairus socius, Nesting trees, Nests, Biodiversity, Birds, Biota, Weaverbirds, Kalahari, Spatial analysis, Modeling.