Silent Valley National Park in the Kundali Hills, harbor endangered species such as Lion-tailed Macaque (Macaca silenus), Indian Sloth Bear (Melursus (Ursus) ursinus ursinus), and Gaur (the so-called "Indian Bison" — Bos gaurus). More common species include Indian Porcupine (Hystrix indica), Chital (Axis axis), Sambar (Cervus unicolor), Gray Langur , Flying