Đười ươi

Orangutan – Pongo pygmaeus has orange-red hair and long arms, capable of grasping with both hands and feet, suitable for their arboreal life. Both sexes are quite different. Male have an average weight and height of 87 kg and 97 cm respectively and females averaging 37 kg and 78 cm respectively. The diet of orangutans is very diverse, including fruits, leaves and shoots, insects, tree sap, bird eggs, mushrooms, flowers, tree bark and sometimes even nutrient-rich soil, of which fruits make up 60% of their total dietary intake.

The orangutan has completely disappeared from mainland Southeast Asia, and only lives in some areas of the islands of Kalimantan and Sumatra in modern day. During the Pleistocene, this species was common not only in North Vietnam but also throughout Southeast Asia from southern China to the island of Java. Many archaeological sites have been surveyed to record the wide distribution of orangutans in most of the northern provinces of Vietnam, including rocky areas in the coastal plain such as Hai Phong, Ninh Binh, the furthest is the archaeological site called Tangerine Cave in Quang Binh. Some researchers believe that orangutans still existed in the Holocene epoch in Vietnam, but currently there is no convincing evidence. At Nguom rock roof site and Phia Vai site, Pongo sp. teeth have been found in the bottom cave layer, which is clearly separated from the cultural layer of the stone age people above. In the cultural layers of the Stone Age, people have not found orangutan tooth bones.