Grasshoppers are herbivorous insects of the suborder Caelifera in the order Orthoptera. These insects have antennae that are almost always shorter than their body and also have a short ovipositor. The sound produced by some grasshopper species is usually produced by rubbing their rear femur against their forewings or abdomen (called stridulation), or by flapping their wings in flight. The hind femur is generally long and strong which is suitable for jumping.
These insects generally have wings, although sometimes they cannot be used for flight. Female grasshoppers are generally larger than male grasshoppers.source