The map of freshwater crocodile species richness – the number of species present in each ecoregion - was generated from species range maps available from the IUCN-SSC Crocodile Specialist Group and Dr. Adam Britton, Wildlife Management International, and the University of Florida. Species range maps were assessed visually and species presence assigned to ecoregions. When a range overlapped several ecoregions, the species was counted as present in all ecoregions of range overlap.