Locust Swarms - What are they, how come they are in India and should you be worried? In this episode of Invasion of Species, we answer these questions. The locust devours crops and leaves serious agricultural damage in their wake. Plagues of locusts have devastated societies since the Pharaohs led ancient Egypt, and they still wreak havoc today. In this episode learn what led to the formation of locust swarms and what's being done to deal with them.