From the animal world:
Employees of the Reserve "Knižinskaya Pushha" settled a male to the female polar sova, so that he made her company. A few days later, the unfortunate was found dead and half-eaten...We showed the remains of the bird to the veterinarian. He found that the male genitals were underdeveloped. In other words, he was not suitable for a female as a partner for mating", he said. Apparently, the male was unable to distinguish himself in the process of mating, and the female killed him, being angry.