Milu is a species of deer known only in captivity. It prefers marshland, and is believed to be native to the subtropics of China. It grazes on a mixture of grass and water plants.

Besides the Chinese official name Milu, a Chinese nickname name translates as "four unlikes," because the animal has been described as having "the hoofs of a cow but not a cow, the head of a horse but not a horse, the antlers of a deer but not a deer, the body of a donkey but not a donkey."