Seems like some people have been able to flock robots like birds with GPS and Wifi http://www.wired.com/wiredscience/2011/09/flocking-robots/ Best regards Jantje
google for Reynolds Flocking Algorithm and you get something called boids.
This one is boids based too - http://www.youtube.com/watch?v=APIXYwkZPsA -
fun!