Many bizarre survival mechanisms exist in nature, and one of the most unusual is sexual cannibalism: a behavior pattern in which females kill and sometimes consume their partners following copulation. While this may seem cruel to humans, studies suggest that this peculiar action benefits the female by providing nourishment or increasing her chance of reproduction and offspring survival. Several animal species are known for engaging in sexual cannibalism.
Jumping Spiders
Some types of jumping spiders practice cannibalism. In these spiders, females are larger and more aggressive compared to males. If the male fails to impress the female through courting gestures, he can become her dinner rather than a mate.
Praying Mantis
The praying mantis is among the creatures that exhibit sexual cannibalism in the wild. In some species, the female consumes her partner following copulation. The nutrients obtained from the consumption of her partner help increase the quality of her eggs, according to studies. Additionally, male praying mantises can mate successfully regardless of their condition owing to their nervous system.
Reasons for Females to Kill Males After Copulation
Researchers have identified several biological explanations for this phenomenon. In many species, cannibalism of the male provides the female with more energy, resulting in healthier offspring. This act is associated with survival and evolution.
Scorpions
In some scorpions, females may turn against males after the mating process. Although such cannibalism among scorpions is rare compared to spiders or mantises, scientists state that environmental pressure can trigger cannibalistic behavior in scorpions.
Female Black Widow Spider
The black widow spider is another notable species. It gets its name from the fact that females sometimes kill their male counterparts after reproduction. Females are much larger than males and often eat them for nutrition.
Redback Spider
A member of the widow spider family, female redbacks are known for sexual cannibalism. Under certain circumstances, a male spider may even expose itself to being eaten by the female after mating. Studies indicate that this behavior helps increase the chance of fertilization.
