Praying mantises are not dangerous to humans. They are nonvenomous insects and rarely bite people. When they do bite, it is usually only if they feel threatened, and their bite might cause minor irritation similar to a mosquito bite. Their mandibles allow them to grab or pinch, but their bite is not poisonous and does not pose a health risk to humans. Praying mantises are considered beneficial predators in gardens as they feed on various harmful insects rather than posing any danger to people.