Stock Photo - 08 February 2019, South Africa, ---: A helicopter is on standby in a private rhino breeding facility in South Africa's Northwest Province to help security forces drive intruders out and prevent poaching. International trade in rhinoceros horns is prohibited. But in Asia, especially in Vietnam and China, horn is popular as an ingredient of traditional medicine and costs about as much as gold. This has led to a boom in poaching, although the horns consist mainly of keratin - like human fingernails. But the superstition in the healing effect is persistent. Photo: Jürgen Bätz/dpa. - ---/South Africa