Note that this does not exist in Minecraft; it was written purely as a fiction article.The Animal Kingdom is a castle that is found in every world. It is where all animals are spawned and enter the world. Other types of animals can be found there.
Where It Is Found
Animal castles are only found in the Forest biome and have a 1/5 chance of spawning. Once a kingdom is spawned, no others will. There is only one in every world.
There are all of the regular animals as well as unique variations special to Animal Kingdoms.