Rhino poaching is big business in Nepal, with hundreds killed every year for their valuable horns.
 
The international demand for these animals is what is keeping the trade and the poachers going. 

To fight the problem, the country's national parks have started using drone technology to stop the illegal trade.  
 
Al Jazeera's Subina Shrestha reports from Chitwan National Park in southern Nepal.

Source: Al Jazeera