The Caelifera are a suborder of phytophagous insects of the order Orthoptera, commonly called caelifera or locusts. They carry, according to their behavior, the name of locust when they are gregarious (tendency to become gregarious) and grasshopper when they are not gregarious. Some species are considered insect pests; in particular the locusts can cause very important defoliations in Africa, in Asia and also sometimes in the south of Europe. There are locusts with a morphology very similar to that of the desert locust in equatorial America, but which do not cause massive defoliation there.
