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As it allows for rapid yet stable movement, many insects adopt a tripedal gait in which they walk with their legs touching the ground in alternating triangles.
Insects are the only invertebrates to have evolved flight.
Other species communicate with sounds: crickets stridulate, or rub their wings together, to attract a mate and repel other males. Humans regard certain insects as pests, and attempt to control them using insecticides and a host of other techniques.
Some insects damage crops by feeding on sap, leaves, fruits, or wood.
Silkworms and bees have been used extensively by humans for the production of silk and honey, respectively.
Insects are consumed as food in 80% of the world's nations, by people in roughly 3000 ethnic groups.
Insects that undergo three-stage metamorphosis lack a pupal stage and adults develop through a series of nymphal stages.The higher level relationship of the Hexapoda is unclear.Fossilized insects of enormous size have been found from the Paleozoic Era, including giant dragonflies with wingspans of 55 to 70 cm (22–28 in).Insects are mostly solitary, but some, such as certain bees, ants and termites, are social and live in large, well-organized colonies.Some insects, such as earwigs, show maternal care, guarding their eggs and young.