These are cool animals! The Mongolian Wild (or Prezwaslski's) Horse is another candidate, imo. There is only one equid species currently in the game. They are a comeback success story, thanks to captive breeding in zoos, but there are still only a couple thousand in the wild.
But it's so hard to choose. I'm kind of surprised how relatively unpopular some of the grazing species are in the game. Aside from giraffes and the Bactrian camels, guests don't seem to care for them, not even the rare and cool-looking okapi draws much interest. I assume the game numbers come from real-life zoo data, but I always enjoyed watching these animals.
