A genus of mammals in the order Carnivora and family Canidae. The body length is 45-90 centimeters, the tail length is 25-60 centimeters, the weight is 2-10 kilograms, and the largest one exceeds 15 kilograms. The female animal is slightly smaller in size than the male animal. There are 12 species of foxes in the world and 3 species in China, namely the red fox, sand fox, and Tibetan fox. They mostly inhabit the banks of forests, grasslands, hills, wastelands, valleys, lakes, and caves in semi desert areas. Foxes usually move alone and mainly live in pairs or families. Foxes have a high reproductive rate, strong disease resistance, diverse diet, and are easy to raise. Has high economic value. Widely distributed in Eurasia and North America.