Of the total number of species found globally, 3.96 percent mammals, 3.72 percent butterflies and 8.9 percent of birds. Wildlife of Nepal is officially classified into two main categories: common and protected. The common category lists such species as common leopard, spotted deer, Himalayan tahr, blue sheep and others. These species are commonly seen in the wild. The protected species include 26 mammals, nine birds and three reptiles. These rare animals are confined to their prime habitats.