It has been recently discovered that engaging in copulation near bats can be deadly for a kind of flies.
Earlier, it has been known that dumpling squids engage in almost 3 hours long copulation sessions so intense that they can barely move after that. It makes them more vulnerable to predators, as they need approximately 30 minutes to regain the normal swimming speed after having sex.
However, scientists have recently discovered that deadly sex problems are not unique to those sensual cephalopods. Common house flies also suffer from this problem while Natterer’s bats take the full advantage of it. These flies create a kind of bizarre and distinctive sound while having sex. This sound attracts the attention of the bats and they swoop and devour the little insects in mid-copulation.
The flies are safe from the bats if they walk along the ceiling of an enclosure at night. But, their copulation sound makes the bats aware of their presence.