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Minimum social network size and ecological heterogeneity. Maps of southeastern Africa showing (A) the minimal distances over which Melikane and Sehonghong’s ostrich eggshell beads were imported given the distribution of viable ostrich habitats, and (B) the diversity of ecological bioregions intersected by a hexagonally packed macroscale social network (10) of the size minimally suggested by our data. For methods used to create this figure, see SI Appendix.
