4 which animals don't seem to refer to?

elk

Its head is like a horse, its horns are like deer, its neck is like a camel, and its tail is like a donkey, so it is also called four unlike. 1900, the last group of elk was captured and killed by Eight-Nation Alliance shortly after being discovered in the west, and disappeared from China. But modernity was brought back from England and began to appear in China.

Elk. A third elk sanctuary was established for it, and now there are a large number of elk in China.

I remember there was such an article in senior high school English class.