thomas` langur presbytis thomasi, also known as the thomas leaf monkey, in gunung leuser national park, sumatra, indonesia

animal asia attraction cercopithecidae closeup color colour conservation creatures day east eating ecology endangered environment forest fragile gunung hiking indonesia jungle langur leaf leuser medan monkey national nature one outdoors outside park precious presbytis primate primates protection rainforest rare rehabilitation south species sumatra thomas thomasi tourism tourist tramping travel trekking walking wild wildlife