Figure 2.

Schematic illustration of the proposed real‐time poaching‐alert system. An electronic tag is fitted inside a rhino's horn (cf. Fig. 1). Multiple sensors continuously monitor the behaviour and physiology of the tagged animal, detecting when it is shot or otherwise badly injured [①]. Once a poaching event has been recorded, a GPS unit boots up to establish the exact location of the animal [②]. Information about the event is then transmitted via satellite uplink [③] to an anti‐poaching team that heads towards the crime scene by helicopter, in an effort to intercept the poacher(s). Meanwhile, after raising the alert, the horn‐mounted tag triggers a miniature camera, which transmits video evidence [④] until the rangers arrive. Graphic: Steve Thompson (http://stevethompsondesign.com/).