Besides orangutans, the Leuser is also home to hundreds of other truly unique animals. There are 380 species of birds, 194 reptiles and amphibians and almost 130 species of mammals inhabiting the park. It is the only stretch of jungle left in the world where elephants, tigers, rhinos and orangutans all live together. While these large mammals are incredibly rare to see, it is possible to go on longer treks to different areas of the forest in search of them. Other animals living here that are easier to find include: hornbills, Thomas langur monkeys, long-tail macaques, pig-tail macaques, palm civets, flying lemur (colugo), butterflies, snakes, gibbons, binturong, giant squirrels, monitor lizards, owls, lantern-bugs, flying dragons, chameleons, trogon birds. If you're very lucky maybe even a slow loris, clouded leopard, sunda pangolin or mouse deer. These are some of the incredible animals that have been seen on previous treks and throughout the Gunung Leuser National Park.
