As someone who has worked a LOT with drones of all form factors (quad copters, propeller drones, battery and dead dinosaur-fueled), when drones can do this, drones will be cool:
I remember that video. It was featured in a TED talk I very like [0]. Murmuration is one of the most amazing things I ever saw on YouTube. Thanks for reminding me of it.
https://www.youtube.com/watch?v=eakKfY5aHmY
Context:
http://en.wikipedia.org/wiki/Passenger_pigeon#Ecology_and_be...