Let’s find out what according to your opinions and observations are 10 the most common zoo species that are still not in the game.
In my opinion those species are:
1. Emu
2. Red necked wallaby
3. Small clawed otter
4. Peccary
5. Coati
6. Serval
7. Eland
8. Red River hog
9. Père David’s deer
10. Scimitar horned oryx
It's very interesting to me that your list doesn't match my zoo experience whatsoever. Aside from the emu and wallaby, I don't believe I've seen any of those species at more than a single zoo, if that. Granted, my perspective is heavily focused on the southeastern US... it just always fascinates me how much these things vary by region. From my own anecdotal perspective, for non-domestic habitat species, it'd look something like this, roughly in order:
- Emu
- North American river otter
- American black bear
- Bennett's wallaby
- White-tailed deer
- Coyote
- Bobcat
- Gray fox
- Fishing cat
- Capybara
Alpacas, dromedaries, goats, and pigs would've certainly made the list if I were including domestics. Perhaps cattle, donkeys, and horses as well.
It's particularly notable that the list includes a whopping six native species. I've mentioned it before, but the base game and Arctic/Aquatic Pack NA roster didn't do a very good job of representing what I've personally seen in zoos: a few polar bears, only a single location with grizzlies and wolves each, and some non-AZA reindeer that I'm not even sure if they should really count since they were only ever at Christmas-related events. The NA pack did help a lot in this regard, bringing in the much more common sea lion, alligator, cougar, and prairie dogs... but the other three species were also ones that I've never seen in captivity. Anyway, I'm not exactly hoping for the NA species on my list in any real capacity besides maybe the bear at this point, but there's still plenty of room to add in more NA species that are very much reflective of what are commonly held in zoos here.
If I were to list only non-NA species, it'd probably end up including:
- Siamang
- Linnaeus's two-toed sloth
- Serval
- Black-handed spider monkey
- Ocelot
- Cape porcupine