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...