Praying Mantises are general predators that feed on aphids, beetles, caterpillars, chinch bugs, Colorado potato beetles, leafhoppers, hornworms, leafrollers, squash bugs, thrips, and whiteflies. They feed on what they can catch! They start off feeding on fruit flies and other tiny insects, and as they grow, so does their prey; as fully grown adults, grasshoppers are eaten. Adults are large (up to 10cm/4in.) green or brownish in color with papery wings.