All five rhino species are threatened with extinction. Due to concerted efforts by governments and dedicated conservationists, some populations have rebounded, but they are not completely out of danger.
The scarcity of rhinos today and the corresponding intermittent availability of rhino horn only drive the price higher and intensify the pressure on the declining rhino populations, according to Save The Rhino.
Poachers are now being supplied by international criminal gangs with sophisticated equipment to track and kill rhinos.
Today, only 29,000 rhinos survive in the world, down from 500,000 in the beginning of the 20th century.
Black rhinos, Sumatran rhinos and Javan rhinos are "critically endangered," which is the list's highest risk category. There are 5,055 black rhinos, fewer than 100 Sumatran rhinos and only 35 to 44 Javan rhinos, according to the activist group.