endangered sumatran lar gibbon hylobates lar vestitus, in gunung leuser national park, sumatra, indonesia.

aceh animal ape asia attraction bukit closeup color colour conservation creatures day east ecology endangered environment forest fragile gibbon gunung handed hiking hylobates hylobatidae indonesia jungle lar lawang leuser medan national nature north one outdoors outside park precious primate primates protection rainforest rare rehabilitation south species sumatra sumatran tourism tourist tramping travel trekking vestitus walking white wild wildlife