Butterflies and Bees, or ButterBee for short, is an add-on for CliffTree adding new biome-based variations for several mobs. With new variations for cows, pigs, chickens, wolves, and more, the world is sure to feel much more diverse!
When using the datapack version, you need to download and enable the ButterBee resource pack. Since version 1.0.4, certain variants may not spawn without CliffTree installed.