LOUISE MURRAY / SCIENCE PHOTO LIBRARY LOUISE MURRAY / SCIENCE PHOTO LIBRARY
White rhinoceros (Ceratotherium simum) horn removal, Umhlametsi Private Nature Reserve, South Africa. A veterinary nurse marks the cutting line on the horn of a white rhinoceros. Horns are removed as an anti poaching measure. The rhinoceros is first tracked from the air and darted with a tranquiliser. The horn, which is made entirely from keratin protein, is removed with a chainsaw ten centimetres above the base. Rhinoceros horns are used as ornaments and for some traditional medicines. Despite horn removal, rhinoceroses are still killed by poachers for the remaining horn stub or out of vengeance.
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