The Western bison is a member of the family Oxidae in the order Artiodactyla. The body length is 220-300 centimeters, the tail length is 40-60 centimeters, and the weight is 450-1000 kilograms. Both female and male animals have horns, which are slender and elongated. The horns first turn inward, then turn upward, and then bend forward. The tips of the horns then bend inward. Female animals have shorter and thinner horns. Small head, exposed snout, small eyes, and short ears. The neck is relatively short, with obvious hanging hair from the lower cheeks to the chest.

The European bison is a member of the family Oxidae in the order Artiodactyla. The body length is 220-300 centimeters, the tail length is 40-60 centimeters, and the weight is 450-1000 kilograms. Both female and male animals have horns, which are slender and elongated. The horns first turn inward, then turn upward, and then bend forward. The tips of the horns then bend inward. Female animals have shorter and thinner horns. Small head, exposed snout, small eyes, and short ears. The neck is relatively short, with obvious hanging hair from the lower cheeks to the chest. European bison breed offspring in spring, and typically cows can produce a calf weighing over 20 kilograms. The lifespan of European bison is quite long, about 40 years in suitable environments.

Sheep are mammals of the family Auchenipteridae in the order Artiodactyla. Full body and dense fur; Short head; Rams often have spiral shaped large horns, while ewes have no horns or small horns; There are tear troughs on the skull, and the nasal bone is relatively raised; Four hooves have toe glands; Sharp mouth, thin and flexible lips; The weight ranges from tens of kilograms to hundreds of kilograms, and the natural lifespan is about 15 years. Sheep originated in Central Asia and gradually expanded to various parts of the world. Gentle temperament, strong imitative and sociable, with a habit of following the leader sheep to gather in groups. Eating short grass, as well as coarse and hard straw and branches. Artificially raised animals can be fed with feed.