Park staff in South Africa have installed GPS devices into Rhino horns to help protect them from poachers. Rusty Hustler, head of security for North West Parks Board, explains:

“There are a number of alarms that can be programmed: one for excessive movement, so if the rhino starts running, and another that goes off if the rhino sleeps for longer than six hours, which is abnormal.”

An alarm also sounds if the chip goes outside of the area of the game reserve.

Poachers could jam the signal to obscure their location but this too would set off an alarm.