Since Mannar is a coastal district, many ecosystems such as terrestrial, freshwater, coastal brackish water and marine, can be seen. An interesting observation is that the species richness of non-protected sites is just as high as the protected areas, with 43% of the species recorded and 54% of endemic and 18% of the threatened species recorded in the Mannar District being recorded in the non-protected area. This implies that the non-protected areas are equally important for biodiversity conservation in the Mannar District.