It has been determined, that the Sumatran Rhino has now gone extinct in the wilds of Malaysia: Sumatran Rhino Goes Extinct in the Wild in Malaysia
It looks like the sumatran rhino will be the first large mammals extinction of the century... What went wrong? Hopefully this will motivate Way Kambas to breed more animals. ~ Thaumatibis
It seems that that award will go to the Northern White Rhino. And for those who think it's a sub-species then the Javan rhino. (Seeing the theme here?)