It can be challenging to keep people off your property if you own a large tract of land. While a fence and security cameras will detract some trespassers, they can only do so much. Therefore, property owners should look beyond stationary cameras and fences in order to keep their assets safe. Thermal drones are perfect mobile security systems since you can fly them practically anywhere, day or night. As their name suggests, thermal drones are equipped with infrared cameras that sense the heat produced by any living organism, including animals and human beings.