Javan Rhinoceros - 

Javan rhinos are the most threatened of the five rhino species, with only around 60 individuals that live only in Ujung Kulon National Park in Java, Indonesia. Javan rhinos once lived throughout northeast India and Southeast Asia. Vietnam’s last Javan rhino was poached in 2010. 

More - https://www.worldwildlife.org/species/javan-rhino