As of September 2016, the International Union for Conservation of Nature (IUCN) lists 529 vulnerable mammalian species. 9.6% of all evaluated mammalian species are listed as vulnerable. The IUCN also lists 53 mammalian subspecies as vulnerable. Of the subpopulations of mammals evaluated by the IUCN, five species subpopulations and one subspecies subpopulation have been assessed as vulnerable.