[–] ditch-digger ago
The problem with talking about the animal kindgom and humans is the fact that humans have developed into highly migratory animals. So, on that criteria I found this in 5 minutes. https://en.wikipedia.org/wiki/Bird_hybrid there are probably more examples out there. But, good luck trying your argument on geneticists.
[–] jxfaith ago
I allow that you've established that distinct species can sometimes reproduce and within that domain also produce fertile offspring. On what basis would you assert the term "species" is a more accurate description of different populations within the human species? By allowing the above, it seems to me that the definition of species gets a lot blurrier.
[–] ditch-digger ago
I do equate species to sub population of humans. The only reason why it's blurry is because its form and usage is already blurry. Species is the singular and plural form. Human species in general usage means all humans. Human species could also mean every species that can be considered human. It's annoying.