Though it is not allowed to hunt rhinos,many are still killed for their horns(角),which can sell for as much as $30,000 each.Most of them are used to make drugs as traditional medicines in Asian countries.Some people believe that the horns work well in treating pain,fever and even cancer.However,there is no medical evidence yet.

　　Black rhino population began falling rapidly in the second half of the 1900s because of poaching.In fact,some people still hunt the animals at the risk of being put into prison.And many of the places where the animals used to live were destroyed when people started building farms on the grasslands.Until the 1960s,about 65,000 black rhinos lived throughout most of Africa.Today,fewer than 5,000 are left—most of them in zoos and wildlife reserves.

　　South Africa has the largest population of rhinos in the world.Poaching is an especially big problem in that country.So far this year,more than 340 rhinos have been killed there.Since 2003,the Black Rhino Expansion Project has been helping the south-central black rhinos in South Africa.The group works with landowners to find areas where rhinos can live safely away from hunters.

　　So far,the group has successfully saved about 120 rhinos.Leaders of the project say the south-central black rhinos have seen a rise in numbers.It is hoped that,with continued support,these rhinos can escape the unfortunate result of the western black rhinos.

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