Melbourne Zoo is home to six Sumatran Tigers: Ramalon, Binjai and our newest additions, cubs Rani, Hutan, Aceh and Indrah. They are part of the Zoo’s participation in an international breeding program. In the wild there are less than 5000 tigers struggling to survive. Sumatran Tigers are the most endangered of the surviving tiger subspecies. There are approximately 300 Sumatran Tigers surviving in their native rainforest.