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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.
The maximum age for a mantis depends on its species. Large species generally live longer than small species. Also females generally live longer than males. When buying a praying mantis nymph, it will take between 4 and 6 months to reach maturity and when adult is will live for another 3 to 8 months.When keeping the mantis relatively cool and not feeding it a lot, its lifespan can be greatly increased.hen buying a praying mantis nymph, it will take between 4 and 6 months to reach maturity and when adult is will live for another 3 to 8 months.