Why Do We Call Them Praying Mantises?

In summer’s abundance, praying mantises grow like corn.
    Emerging in spring warmth from their tan, papery egg masses, they are tiny, pale-green nymphs. By autumn, after several exoskeleton sheddings and many good meals, the tan, winged adults can be six or seven inches long.
    The habit of folding their long forearms gives the species the name praying mantis. They might better be called preying for they use those arms to grasp food, mostly other insects. Thus they’re good bugs for your garden. Their predation can include male mantises that, useless after mating, may be turned into food by the females making eggs for next year’s generation.
    Like corn, mantises mostly wait for their food to come to them, as they are ambush predators. With two protruding compound eyes and three small simple eyes, they see well. All the better as their flexible necks enable them to rotate their heads, almost 180 degrees in some species. Most of the members of the plentiful order are camouflage artists, with our praying mantises copying twigs. The unsuspecting bug that comes too close to this twig becomes dinner, held in those praying arms for devouring.
    Also like corn, mantises are ­annuals, productive for one season but doomed by cold weather.
    Corn has been harvested in most of our fields. But mantises are around a while longer.