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No, it is a common misconception that they spit a toxic substance. Mantis may "spit" a brown substance around their mouths as a defensive regurgitation like some other insects do, but this secretion is not dangerous to humans.

Additional note: However, you may be thinking of a type of walking stick insect that can actually "spit" secretions away from itself in defense of predators. The substance they spit can not kill but it can cause irritation where it hits, and even temporary blindness if it hits an eye. This insect is in an order of insects called Phasmatodea or Phasmida. In the US generally they are in the family of Phylliidae. One such type among the particular species that spit this substance is in the genus Anisomorpha.

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16y ago

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