Snow monkeys, also known as Japanese macaques, are a species of primate native to Japan. They are famous for their thick fur, which helps them survive in cold climates, especially in the snowy regions of Honshu. These monkeys are social animals, often seen in large groups, and they have a complex social structure. One of the most notable behaviors of snow monkeys is their use of hot springs, or onsen, to warm themselves during winter. This unique behavior has made them a popular attraction at various tourist sites, where visitors can observe these monkeys relaxing in the warm water while surrounded by snow.