In South Africa, the demand for rhino horn is at an all time high, despite the black market price of around $55,000 per kilogram.
Over 300 cases of poaching were recorded just last year, more than triple that of the year before.
Now the elephant - with its acute sense of smell being used to halt poachers in their tracks - could be the rhino's unlikely protector.
Al Jazeera's Jonah Hull reports from South Africa.
