Locusts are simply grasshoppers who bumped up against Malthus. Literally. http://www.asknature.org/strategy/33ba1618fc358f29f0be63a19ee36050 http://www.asknat

Locusts are simply grasshoppers who bumped up against Malthus. Literally. http://www.asknature.org/strategy/33ba1618fc358f29f0be63a19ee36050 http://www.asknature.org/strategy/33ba1618fc358f29f0be63a19e... The grasshopper population grows until they start physically bumping into each other. Then they turn into locusts. The swarm moves because the front of the swarm is eating all of the plants, which leaves nothing for the locusts at the rear of the swarm. i.e. the ones at the rear of the swarm start eating the ones in front of them. Who move in order to stay alive.