Minecraft wiki entry for Livestock, associated text: Cow, a passive mob from the Overworld.
Donkey, a passive tameable and rideable mob from the Overworld.
Horse, a passive tameable and rideable mob from the Overworld.
Goat, an upcoming mob announced for 1.17.
Mule, a tameable mob from breeding a horse and donkey.
Pig, a passive rideable mob from the Overworld.
Sheep, a passive mob from the Overworld.