The road networks in most large African game reserves are pretty rudimentary, forcing field rangers to patrol vast areas on foot. But even if they are lucky enough to enjoy air support or have access to vehicles, rangers still need the element of surprise when intercepting armed poaching gangs. The solar-powered, electric bush bikes, developed by the Stockholm-based Cake group, are powerful all-terrain motorbikes. (Photo: Supplied) In the Kruger National Park, the epicentre of the rhino horn war, poaching has been the main reason for a dramatic two-thirds decline of the world’s single-biggest population of wild rhinos over the past decade – despite the deployment of a wide range of expensive and sophisticated anti-poaching technologies.