There are less than 200 Sumatran rhinos remaining in the world , according to the International Rhino Foundation ( IRF ) , making it the most endangered of all rhino species . Sumatran rhino born in Indonesia , the fifth known to have been born in captivity ever . Score: 7 Less than 200 Sumatran rhinos remain in the world , making it the most endangered of all rhino species .
Sumatran rhino born in Indonesia , the fifth known to have been born in captivity ever . Score: 7 Less than 200 Sumatran rhinos remain in the world , making it the most endangered of all rhino species .