A locust is a type of grasshopper known for its ability to form large swarms. These insects can change their behavior and physical characteristics when populations become dense, leading to swarming behavior. Locusts are primarily found in Africa, Asia, and Australia, where they can cause significant agricultural damage. When swarming, locusts can travel long distances in search of food, consuming crops and vegetation in their path. This can lead to food shortages and economic challenges for affected regions. Control measures often include pesticides and other management strategies to mitigate their impact on agriculture.