The lifespan of a mantis depends on the species. Smaller ones may live 4 to 8 weeks, while larger species may live up to a year.

The world's largest recorded praying mantis was discovered in Southern China in 1929. It measured about 7 inches (18 cm).

In stereo vision, eyes capture two different views of a three-dimensional object. Retinal images are fused in the brain in a way that their disparities (or parallaxes) are transformed into depth perception, yielding a three-dimensional representation of the object in the observer's mind. humans are not the only animals that have stereo vision. Other animals include monkeys, cats, horses, owls and toads. But the only insect known to have stereo vision is the praying mantis.