Adults have blackish bodies, red eyes, and 4 membranous wings with a gold, orange, or red tinge. They crawl and fly, but do not jump. The mouthparts, tucked beneath the head, are like a small, sharp straw. The antennae are short, and there are 3 ocelli (eyespots) in addition to the 2 larger, compound eyes. Compared to annual or “dog-day” cicadas, periodical cicadas are smaller. Adult males have a sound-producing organ that emits a loud, raspy call used to attract females. Adult females have a curved ovipositor at the lower end of the abdomen, used to insert eggs into slits in twigs. Nymphs are tan or brownish, wingless, stout, with the front pair of legs specialized for burrowing in the soil and for clinging onto trees as they undergo their final molt into adults. Neither nymphs nor adults are capable of harming people.