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grasshopper, (suborder Caelifera), any of about 11,000 species of jumping insects of the order Orthoptera that are found in a variety of habitats. Grasshoppers occur in greatest numbers in lowland tropical forests, semiarid regions, and grasslands. Although most grasshoppers are herbivorous, only a few species are important economically as crop pests. Most species feed on a wide variety of plant species, though some are restricted to a single plant species or one group of plants....