Another good non-military use for drones, reported in Fast Company:
Brazil's environmental police are deploying unmanned aerial vehicles (UAVs), or drones, to monitor the country's vast forest for illegal logging, drug trafficking and other crimes. Named Arara (Parrot) and Tiriba (Little Parrot), the home-grown planes are taking flight to watch over the world's largest remaining rainforest, the Brazilian Amazon
The São Paulo Environmental Police will be the country's first agency to regularly employ (unarmed) UAVs to monitor remote areas for deforestation, illegal fishing, and sand mining. The drones, built by AGX Tecnologia using technology developed at the University of São Paulo, can be deployed almost anywhere, and stay aloft longer than their human-piloted counterparts. AGX’s latest version, with a 10-foot wingspan, can be launched just by throwing it.