Adegsm / Getty Images. Yes, Female Praying Mantises Do Eat Their Mates. It is said that only 15% of praying mantis females consume a male after mating. Females will sometimes bite a maleâs head off after mating. In their study, published in Proceedings of the Royal Society B, the authors decided to investigate what purpose 'sexual The female praying mantis is notorious for killing her mate after intercourse. Praying mantises are supremely gifted in camouflage. An orchid mantis perches atop flower petals. The female typically begins by biting off her partnerâs head, and she works down from there. Female praying mantis eat their male partner after sexual intercourse as it may increase their fertility and ensure the potential survival of the species, scientists have said. A praying mantis will eat or try to eat just about any insect it can grab a hold of and is not strong enough to fight back, and another mantis is no exception. In this method, the female kills or feeds herself on the male after mating. i really dont know why they eat the male...but..yeah on youtube i was watching videos and praying mantis's can eat humming birds and lizzards :O kind of scary but they dont harm humans :D. Source(s): me :D. 1 7. They come in the form of ⦠The male will have more of his genes passed on to the next generation if he fertilizes more eggs, and more eggs are laid by females who eat their matesâ88 vs. 37.5, in one study. by Jesslyn Shields Oct 30, 2020. Of the species of praying mantises known to exhibit sexual cannibalism it is estimated up to 28% of males are eaten by their partner. In praying mantids, females eat their male mates around 30% of the time. ... On the other hand, if the male is only exposed to one female during its lifetime, he will linger around after copulation so that the female might eat him afterwards. In praying mantises, around 25 per cent of all sexual encounters result in the death of the male. People also ask, why do Praying Mantis females eat the males? Eating prey isnât the only feeding that praying mantises do. This is actually a topic of debate though many researchers deny the hypothesis. While itâs still strange to researchers as to why this is done, many believe that this could be beneficial to the number of eggs a female praying mantis lays. Most mantis species are cannibalistic. After mating, the female stores the male's sperm and later uses it to fertilise the eggs that she produces. This gives her the nutrients she needs to lay eggs. The praying mantis is well-known for two things: 1) the posture that makes it look like the insect is praying, and 2) the fact that the female often devours the male throughout the mating process. In some species of praying mantis, females eat the head of their mate after copulation. 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