Mahmood Rattansi

The precise moment at which a group of independently milling locusts loses its chaotic aspect and transforms into a highly aligned swarm has been pinpointed by researchers. The finding could provide a new weapon in the campaign to control the pests which devastate vegetation in Africa and Asia, with dire impacts on agriculture, health and economies.

http://www.newscientist.com/article/dn9255-how-locusts-decide-its-time-to-swarm.html