Wolves are carnivorous animals in the family Canidae. There are a total of 11 subspecies. Medium and symmetrical body shape, slender limbs, toe mobility, conducive to fast running. Habitat in forests, deserts, mountains, cold grasslands, coniferous forests, and grasslands. It is a nocturnal animal that is good at running quickly and over long distances. It prefers to live in groups and often curls up alone or in pairs in caves during the day. However, it also comes out for activities during the day in sparsely populated areas. Carnivorous, feeding on herbivores and rodents. Except for Antarctica and most islands, it is distributed all over the world. Listed as a second-class species in China's National Key Protected Wildlife List (February 5, 2021).