The Strepsiptera (translation: "twisted wing"', giving rise to the insects' common name, twisted-wing parasites) are an endopterygote order of insects with nine extant families making up about 600 species. The early-stage larvae and the short-lived adult males are not sessile, but most of their lives are spent as endoparasites in other insects, such as bees, wasps, leafhoppers, silverfish, and cockroaches.