Fox: the body length is 45-90cm, the tail length is 25-60cm, the weight is 2-10kg, and the largest one is more than 15kg. The female is slightly smaller than the male. The body is medium and symmetrical, the limbs are long and slender, and the toe line is good for fast running. The head and palate are pointed, the face is long, the nose tip is prominent, the ear tip is upright, the sense of smell is sensitive, and the hearing is developed. Canine teeth and split teeth are developed; The upper molar has an obvious tooth tip, and the lower molar has a small tooth tip and a heel tip inside; The crown diameter of molar teeth is larger than the height of lateral incisors; The gear type is. The hair is thick and long, generally without patterns. The claw is thick and blunt, and can stretch slightly. The tail is hairy and generally developed.

He is good at running fast and long distances, likes to live in groups, and often hunts for food. Omnivorous, feeding on herbivores and rodents; Some eat carrion, plants or omnivores. Fox has a high reproduction rate, strong disease resistance, mixed feeding habits and is easy to raise. It has high economic value. It is widely distributed in Eurasia and North America, and also introduced to Australia and other places.