μάντις

Greek mántis means 'prophet,' 'seer,' or 'diviner.' The same root gives us mantic (relating to prophecy) and the suffix -mancy in necromancy, chiromancy, and other divination words. The insect was called mantis because its raised forelegs, held together in front of its body, resemble a person praying or awaiting a divine vision. The full name 'praying mantis' is a seventeenth-century English redundancy — the Greek word already contains the prayer.

Ancient Greeks believed the mantis had supernatural powers. Farmers used its posture to predict weather. Travelers watched which direction it pointed to find their way. The Provençal name for the mantis is prega-Dieu (pray to God). In Japanese, it is kamakiri (sickle cutter), focusing on the forelegs' predatory function rather than their prayerful appearance. Chinese martial arts developed an entire style — tanglangquan (praying mantis fist) — based on the insect's combat posture, attributed to Wang Lang in the seventeenth century.

The mantis is one of the few insects that can rotate its head 180 degrees, giving it binocular vision and depth perception unmatched in the insect world. It strikes prey in under 50 milliseconds — faster than a human can blink. The sexual cannibalism for which mantises are famous — the female eating the male during or after mating — occurs in roughly 13 to 28 percent of encounters in the wild, far less than popular belief suggests. In laboratory settings, where the insects are stressed and underfed, the rate is higher. The popular image is a lab artifact.

The word mantis entered English in the 1650s through natural history texts. Linnaeus formalized it as the genus name Mantis in 1758. The prophet that the Greeks saw in a folded pair of forelegs became a scientific classification, then a martial arts style, then a cultural symbol of patience and sudden violence. The prayer and the strike are the same gesture.