Hello there!
Could you please add the mod "Prehistoric Spawns"?
Link: Prehistoric Spawns
Desc: Prehistoric Spawns is a mod which allows the mobs from Fossils and Archaeology to spawn naturally in the wild.
You can build parks or even try to survive the prehistoric creatures as they run after you, or you could even make
documentaries by going into the in game config to allow only certain prehistoric creatures to spawn.