As we celebrate World Rhino Day today - 22 September - we recognise the pioneering technological innovations that are proving to be highly effective in protecting Africa’s threatened rhino populations from poachers. For almost five years, Postcode Meerkat – the most advanced wide-area surveillance system ever developed for counter-poaching purposes on the African continent – has kept an eagle eye over vast sections of wilderness in South Africa’s world-famous Kruger National Park, becoming a key piece in a much larger puzzle that protects one of the last remaining strongholds of wild rhino in the world.