Pretty sure the wiki is out of date. I'm also fairly sure I saw the devs say they will be using some default assets for common plants and animals, so we'll likely see regular mice and wolves and foxes running around with the dryas elk and canis rabbits that have been created. For a world this size they can't realistically create everything from scratch.
I'm a forester. A man who takes trees that are all different and cuts them into boards that are all the same / Seeds that are all the same, and grows them into trees that are all different.