Okay, so, we can't have an intellectual conversation about animals if you don't know what a subspecies is.
White rhino branches into the southern white rhinoceros and the northern white rhinoceros. The latter is nearly extinct, the former is extremely common in zoos.
The black rhinoceros then branches into the eastern and western, south-western, Chobe, Ugandan, and so on.
I'm sorry, I hate saying this kind of thing, but I feel like I know more about this subject than you do, so please stop explaining things to me like I'm in a grade below you. I literally work in a zoo every weekend - I know how these things work. I have a degree in biological sciences, and I specialised in zoology. I do some work with the department of conservation in my country (New Zealand). This is my area of expertise, I know what I am talking about.
Not a lot of people know that there are subspecies directly linked to where they come from. So please dial down your "expertise". It is nice to learn that they have regional subspecies.. But what makes them different? There are environmental differences that have caused each animal to change physically. But when looking at an animal, here's the thing.. And here's an added shocker.. They actually are believed to be separate species and not a subspecies.. ( https://www.asiliaafrica.com/whats-the-difference-between-northern-and-southern-white-rhino/ )
Also my whole argument here, is that having one animals of a species or subspecies is not enough because each animal is different.. They don't all live in the same habitats, ranges, ect, ect.... My other point here was that we do have a lot of African animals already.. I hope they bring in Australian animals, however they decide to do it..
I was not the person that brought up Rhino's.. Someone else did.. and so i started to explain.. Did i explain it exactly the way you would, probably not.. but i also gave more information on the animals themselves..