The Sumatran rhino is the most endangered of all rhinoceros species due to its rapid rate of decline. Because of poaching, numbers have decreased more than 50% over the last 20 years, with the only populations now in Indonesia. The species was declared extinct in the wild in Malaysia in 2015. Sumatran rhinos exist only in protected areas where they are physically guarded by Rhino Protection Units. Continued protection, combined with consolidating small, fragmented populations into larger ones, provides the best possible hope for the species’ survival.