Deer is the only deer species in the family Deer and genus Deer. Because its head and face are long and narrow like a horse, its horns are slightly different from other deer, its hooves are wide like cows, and its tail is slender like a donkey, it is also known as the Four Elephant. Its horn shape is unique, opposite to the horns of other deer. The front branch splits into smaller branches, while the back branch hardly splits. The head has a long and narrow snout, the exposed part of the nose is wide, the eyes are small, and the infraorbital glands are very prominent. The limbs are thick and the main hooves are broad and fleshy, with well-developed hanging hooves and a loud knocking sound when walking. Deer prefer swamp and wetland habitats, feeding on green grass and aquatic plants. Good at socializing, good at swimming, and enjoys eating tender grass and aquatic plants.

The elk (scientific name: Elaphurus davidianus) is the only deer species in the family Deer and genus Deer. Because its head and face are long and narrow like a horse, its horns are slightly different from other deer, its hooves are wide like cows, and its tail is slender like a donkey, it is also known as the Four Elephant. Its horn shape is unique, opposite to the horns of other deer. The front branch splits into smaller branches, while the back branch hardly splits. The limbs are sturdy, the main hooves are broad and fleshy, with well-developed hanging hooves, and there is a loud knocking sound when walking. I prefer swamp and wetland habitats and feed on green grass and aquatic plants. Good at socializing, good at swimming, and enjoys eating tender grass and aquatic plants.

Camel deer is a mammal of the camel genus in the family Camelidae of the order Artiodactyla. Camel deer have a larger body size, generally ranging from 2-2.6 meters in length.. The moose is named after its hump shaped back hump and horn shaped lower jaw. Camel deer are distributed in subarctic regions such as Russia, Northern Europe, and North America, and are also found in the Greater and Lesser Khingan Mountains of Northeast China. Camels have a high status in many cultures. However, due to hunting and habitat destruction, the number of moose has decreased, and it is now listed in China's "National Key Protected Wildlife List" and recognized as a first level national key protected animal.