Unmanned aerial vehicles are becoming a valuable tool for a number of applications. This statement is particularly true when these vehicles are working in cooperative groups and as part of larger systems. However, there are many challenges that have to be addressed in order to get most of them. These challenges motivate my work in this area. Check the interview Prof. Edison gave to the TV show AgroBand about the use of UAVs in precision agriculture (in portuguese - after 3:34).
https://youtu.be/b1u5wNAT78I?t=3m35s