Elk (scientific name: Elaphurus davidianus), also known as "Four Dislikes", is a rare animal in the world and belongs to the deer family. Because its head and face resemble a horse, its horns resemble a deer, its neck resemble a camel, and its tail resemble a donkey. It is native to swamps in the middle and lower reaches of the Yangtze River in China, and uses grass and waterweed as food. Good sex, good swimming, like to feed on tender grass and aquatic plants. Courtship begins in late June and lasts about 6 weeks. Once widespread in East Asia. Later, due to natural climate change and man-made factors, it was almost extinct in the late Han Dynasty. In the Yuan Dynasty, the remaining elk were captured and transported to the Royal Hunting Park for safari hunting. By the 19th century, there were only a group in the Royal Hunting Garden of Nanhaizi in Beijing. Shortly after its discovery in the West, it was captured by the Eight-Power Allied Forces and has since disappeared in China. It was purchased by the British in 1898 and bred to 255, and some individuals were returned to China in 1983. Since then, more elk have returned to their hometowns and some have been released into the wild.