3 years after people, In the 1800’s Rocky Mountain Locusts were a common sight. They ranged from the Rocky Mountains to the Mississippi and when they swarmed there swarms could reach as large as 2000 square miles. In the late 1800’s farmers started to live on the locusts’ habitat in the upper Rocky Mountains and within 25 years the population of the Rocky Mountain Locust had dwindled and disappeared. Only a few pockets survived in places such as Yellowstone. Now with the human farmers that intruded on their habitat gone forever, the Rocky Mountain Locusts have begun making a comeback.
30 years after people, The population of the Rocky Mountain Locust has returned to a high enough density that they swarm once again.