Yes, animals can have mated with other species who are quite different from themselves.
Although mating conduct between species, also known as interspecific or heterospecific mating behavior, is not often as stunning as this particular incident, it is nevertheless shocking in some cases. There are numerous hybrids that demonstrate that animals can be less discerning when it comes to picking mating partners, especially when there are other closely related species around to witness this phenomenon. Alternatively, if their would-be paramour had the same desirable features that they would seek in females of their own species, such as enormous size, they may seek out mating partners from a different but closely related species as well.
Things have the potential to become far more gloomy when it comes to Antarctic fur seals and king penguins.
The Antarctic fur seals have developed the practice of attempting to mate with king penguins, an animal that they would normally kill and devour if they came into contact with it.
Meanwhile, male southern sea otter males occasionally rape juvenile harbor seals to death.
The macaques and deer are up to sound a lot more reasonable than they originally appeared to be.
Nonetheless, while it is not as if no one could have predicted this outcome, the situation with the Japanese macaques is quite exceptional. Several researchers claim they have published what they believe is the first quantitative report on non-human primates interacting with non-primate partners in the wild.
What causes this to happen?
In species that are closely related to one another, interspecies s*xuality is more common than in species that are dissimilar to one another because it makes more sense; these animals are more likely to become confused or to see the characteristics they naturally seek in a mate displayed in an inconvenient way in the member of another species. It’s a little more difficult to deduce the motivation behind the mating of more dissimilar organisms.