GUWAHATI, July 26: Fifty-one rhinos have been killed by poachers in Orang national park in less than a decade. After the rhino population was wiped out at Laokhowa wildlife sanctuary and Manas national park, rhinos at Orang are now facing extinction. According to available figures, the rhino population has plummeted from 97 in 1991 to 46 in 1999. This year, five rhinos have been killed till July. Unabated poaching has also reduced the rhino sites in Assam from five to three. Earlier, rhinos were found in five protected sites - Kaziranga, Pobitora, Manas, Laokhowa and Orang. With the rhino...