The insect most known for killing after mating is the praying mantis.
Sexual Cannibalism in Insects
Sexual cannibalism, where one partner kills and consumes the other during or after mating, is a fascinating but often grim phenomenon in the animal kingdom. While it's not exclusive to insects, it is relatively common within certain insect and spider species. The provided reference highlights the behavior of praying mantises as an example.
Praying Mantises: The Classic Example
- Female Predation: The most well-known example of post-mating killing among insects is the female praying mantis. After, or even during, copulation, the female may bite off the head of her male partner.
- Reasons for Cannibalism: While it might seem gruesome, scientists believe this behavior has evolutionary benefits. Some theories suggest it provides the female with a readily available source of nutrients necessary for egg production. There is also some evidence to suggest that male mantids can continue mating even after being decapitated, thus increasing the chances of fertilization.
Other Examples
While the reference notes that "sexual cannibalism may occur in the species only rarely" with black widow spiders, the focus here is on insects, and praying mantises are the most prominent and commonly recognized example. The practice does show up in spiders as well, not just insects.
Summary
| Insect | Post-Mating Behavior |
|---|---|
| Praying Mantis | Female kills and eats male |
