Locust Plague of 1874

The Locust Plague of 1874, or the Grasshopper Plague of 1874, occurred when hordes of Rocky Mountain locusts invaded the Great Plains in the United States and Canada. The locust hordes covered about 2,000,000 square miles (5,200,000 km) and caused millions of dollars' worth of damage. The swarms were so thick that they could cover the sun for up to six hours. Efforts were made to stop the infestation, including eating the locusts. Following the plague, the population of Rocky Mountain locusts continued to decline each year after 1874 and in spring 1875, many of the hatched locust eggs died due to frost, contributing to their eventual extinction.