A scary bit of history.
On July 20, 1875, the largest recorded swarm of locusts in American history descended upon the Great Plains.
People said the locusts descended like a driving snow in winter. They covered everything in their path. They sounded like thunder or a train and blanketed the ground, nearly a foot deep. Trees bent over with the weight of them. They ate nearly every living piece of vegetation in their path. They ate harnesses off horses and the bark of trees, curtains, clothing that was hung out on laundry lines. They chewed on the handles of farm tools and fence posts and railings. Some farmers tried to scare away the locusts by running into the swarm, and they had their clothes eaten right off their bodies.
The Writer's Almanac :: July 20, 2005