Centipedes (Class Chilopoda) are fast-moving venomous, predatory, terrestrial arthropods that have long bodies and many jointed legs. Chiefly nocturnal, centipedes are found primarily in tropical climates but are also widely distributed in temperate zones. Some species are highly venomous but none can cause death in humans who are not allergic. As in the millipedes, they are highly segmented (15 to 173 segments), but with only one pair of walking legs per segment. Centipedes are dorso-ventrally flattened, and are among the fastest and most agile of non-flying arthropod predators.