Squirrels are mammals belonging to the family Squirrels in the order Rodentia. Because squirrels look like mice and most of them like to gnaw on nuts such as pine cones, they are accustomed to living on trees, especially pine trees, hence the name. Squirrels are widely distributed in Asia, North and South America, and Europe. Squirrels are omnivorous animals that eat a variety of plants, including nuts, seeds, pine cones, fruits, fungi, and green plants, as well as insects. Squirrels have medicinal value, with a sweet and salty taste, a neutral nature, and the effects of regulating qi, regulating meridians, reducing accumulation, and relieving pain. Squirrel meat is edible and has a fragrant scent of pine nuts. Squirrels are valued for their fur and are important resource animals in the hunting industry.