 The International Union for Conservation of Nature and Natural Resources ( IUCN ) classifies the impala as a species of least concern overall ; the black @-@ faced impala , however , is classified as a vulnerable species ; as of 2008 , fewer than 1 @,@ 000 individuals are estimated in the wild . Though there are no major threats to the survival of the common impala , poaching and natural calamities have significantly contributed to the decline of the black @-@ faced impala . As of 2008 , the population of the common impala has been estimated at around two million . According to some studies , translocation of the black @-@ faced impala can be highly beneficial in its conservation . 
