11 Of The Most Bizarre Animal Mating Behaviours In The World

Killer Marathon Sex

The antechinus is a small, mouse-like marsupial. Male antechinuses are not afraid of death. In fact, they are willing to give up their life just to pass on their genes and create a new generation. Male antechinuses take mating so seriously that when they have sex, they copulate almost continuously for two to three weeks until they die of exhaustion. During these weeks, they run around the forest from mate to mate and have sex with each one for up to fourteen hours straight. Mating with so many different partners takes such a toll on male antechinuses that their immune system crashes because of a massive release of hormones, their fur starts to fall out, and they bleed internally. As a result, female antechinuses are left alone to raise their offspring.