Javan Rhinoceros or one-horned rhino or Rhinoceros sondaicus is family of Thonicerotidae and one of 5 rhino species which still exist. This rhino has same genus as one in India and has mozaik skin as armor cloth. Its size can be 3.1 to 3.2 m long and 1.4 to 1.7 m tall, smaller than the Indian rhino and as big as black rhino. The horn size is smaller than other rhinos.
Though it is called as Javan Rhino, it can be found in Indonesia, South East Asia,India and China. The species is in critical status and very few live in the wild. This is probably the rarest mammals in the world. Only 40 to 50 can be found in Ujung Kulon National park and in Cat Tien national park Vietnam was only 8 in 2007. Javan Rhino number decrease was due to the use of the horn for medication by Chinese, the price per kg of the horn is USD 30.000 in black market. Other reason is because of wars in South East Asia and also disasters. In Indonesia the relatively safe area for the rhino is in Halimun National Park in Gunung Salak, West Java.