Zebra

Zebras were Earth-native mammals. The First Doctor commented upon an engraving of a zebra that apparently depicted it with two heads. (DW: The Ark)

Redvers Fenn-Cooper had killed at least one zebra. He took its head as a trophy and had it displayed on a wall in Gabriel Chase. (DW: Ghost Light)

On an unnamed planet in another dimension, partially inhabited by ex-Tellac miners, K9 discovered some zebra living amongst a whole kingdom of Earth animals from widely different periods of evolutionary history. (AK9: K9 and the Missing Planet)