The last known Javan rhinoceros from the subspecies Rhinoceros sondaicus annamiticus was found dead in Vietnam with its horn cut off, most likely a victim of poachers. Another subspecies, The Indian Javan rhino (R. sondaicus inermis), is believed to have gone extinct in the early 20th century.
With only about 50 members left from the Indonesian subspecies, R. sondaicus sondaicus, in West Java, the outlook for these animals is bleak.
CP Groves, DM Leslie. Rhinoceros sondaicus (Perissodactyla: Rhinocerotidae). Mammalian Species, 43(1):190-208. 2011.
Ramono, W., Isnan, M. W., M., Sadjudin, H.R, Gunawan, H, Dahlan, E.N., Sectionov, Pairah, Hariyadi, A.R., Syamsudin, M., Talukdar, B.K., and Gillison, A.N. 2009. Report on a Second Habitat Assessment for the Javan Rhinoceros (Rhinoceros sondaicus sondaicus) within the Island of Java. International Rhino Foundation, Yulee, FL, USA.