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Later they will eat larger insects, beetles, grasshoppers, crickets, and other pest insects. Praying mantises are large, solitary, slow moving, and predaceous insects that catch their prey with their front legs. They do not have jumping hind legs. Of the 20 species of mantises that occur in North America, the introduced Chinses mantis, at a lenght of as much as four inches, is the largest.
Lifespan. Praying Mantids start out life in an ootheca egg mass. Usually laid in the fall on a small branch or twig, the egg mass then hatches in the spring to early summer as warming temperatures signal the time for birth. The natural lifespan of a praying mantis in the wild is about 10 - 12 months, but some mantids kept in captivity have been sustained for 14 months. In colder areas, female mantids will die during the winter. Males tend to suddenly die about 2 to 3 weeks after mating in the fall, This is usually caused by the female's urge to kill off the male once the egg pouch has been produced. (U.S. Mantids).