Grasshoppers are amongst the most ancient living groups of chewing herbivorous insects dating back to the early Triassic period around 250 million years ago. When they are forced to crowd together due to environmental changes, they will transform into locusts which swarm in the millions and destroy crops over wide areas.
If you've ever wondered what a smear campaign in an rpg campaign would look like, you need go no farther than part 5 of the Age of Ashes adventure path under the Pathfinder 2nd Edition system! For characters level 15 to 17.