Pigs (Pig, Swine) are vertebrates, mammals, domestic animals, and ancient omnivorous mammals, mainly divided into domestic pigs and wild boars. Currently, people believe that pigs are the abbreviation for animals in the pig family, and pigs have different physical characteristics depending on their breed; Usually characterized by large ears, long head, short limbs, straight nose, fat body, and narrow waist and back. The hair is coarse and hard, and the fur colors are usually white, pink, black, brown, and floral. Domestic pigs are a subspecies of wild boars that have been domesticated by humans. They have shorter tusks than wild boars and are one of the domesticated livestock by humans.

The Eurasian wild boar is a medium-sized mammal belonging to the family Porcidae in the order Artiodactyla. Weight 90-200 kilograms; The body length is 1.5-2 meters, the tail length is 21-38 centimeters, and the ear length is 24-26 centimeters; Shoulder height is about 90 centimeters. Eurasian wild boars have extremely strong environmental adaptability. Their habitats span across temperate and tropical regions, ranging from semi-arid climates to tropical rainforests, temperate forests, semi deserts, and grasslands. The Eurasian wild boar originated in Europe and Asia and was widely introduced to North America, with a wide distribution range covering the Eurasian continent.