The brown bear is a mammal belonging to the genus Ursa in the family Ursidae. He has a strong physique, with raised shoulders and a short tail behind him. The fur color is mostly brown or brownish yellow; Elderly individuals appear silver gray in color; Childhood is brownish black. The lifespan under wild conditions is 20-30 years. Brown bears are widely distributed, mainly in Eurasia and North America. In China, they are mainly found in Xinjiang, the Qinghai Tibet Plateau, and the mountainous areas of Northeast China. Strong adaptability, able to survive tenaciously from the edge of deserts to high mountain forests, and even ice fields. Omnivorous type. The only mammal that can go without eating, drinking, urinating, or defecating for six months or even longer is a second-class protected wild animal in China.