guardian
http://www.theguardian.com/environment/video/2014/feb/10/rhino-microchipping-in-kenya

Rhino microchipping in Kenya - video

In a dawn operation, rhinos in the Mara region of Kenya are tranquilised by rangers. A multidisciplinary team of researchers, vets and technicians take over to drill a tiny hole in the horn to insert a microchip. Another is implanted in the body and a unique pattern is put on the rhino's ears. Microchipping, conservationists say, is essential to protect the endangered black rhinos. 'If Kenya loses its rhinos, it will lose its heritage,' says Robert Nedeti, species manager at WWF Kenya