Locusts. They’re normally solitary insects, but when there’s an abundance of crops, then numbers can reach plague proportions. These flightless hoppers can form armies a kilometre long, but they have only. Just begun on their path of destruction. Five weeks old, they move. It’s a fully fledged adults and can take to the air. A swarm this size may only happen once in a decade, not just travelling over 18 kilometres a day. They can develop 40,000 tonnes of vegetation, including farmers, precious rice crops. On reaching the highlands, a plague is finally stopped by the heavy mountain rains. Wet wings prevent the locusts from flying until eventually the swarm runs. Out of food. And dies.