Grasshoppers are medium to large-sized insects most notable for their ability to jump great distances. A grasshopper can leap as much as 20 times its body length. These insects can also fly, moving up to eight miles an hour. Grasshoppers are troublesome when they appear in large numbers. One study revealed that just six to seven grasshoppers per square yard spread across 10 acres will eat as much as one cow. If you’re dealing with a high grasshopper population, you may need a professional’s help. You may have seen them many times on your San Antonio property.