Parks and Nature Reserves are included: 
Located in Ninh Binh Province around 100km from Hanoi, Van Long Nature Reserve and its isolated limestone mountains are home to one of the world's most endangered primate species: the Delacour's langur, or Delacour's lutung. The total population of this primate is estimated to 200 to 250 individuals, surviving in 19 isolated subpopulations. The species is believed to be extirpated from three additional sites, and some important populations, including Cuc Phuong National Park and Pu Luong Nature Reserve. And the largest subpopulation exists in Van Long Nature Reserve, and totals about 50 individuals.
Phong Nha National Park’s landscape is formed by limestone plateaux and tropical forests, so it’s suitable habitat for Ha Tinh langur, another species of the “limestone langur”-group. Based on interviews and field observations of Vietnamese scientists in 2000, there are approximately a maximum of 800 individuals appearing in the park. However, large parts of the area are not easy to survey due to difficult accessible terrain, and likely the size of this population is underestimated. The main threat to this species is hunting. The animals are killed mostly for traditional medicine. 
Son Tra Nature Reserve in Danang city and its evergreen tropical forest is home to estimatedly 180 individuals of red-shanked douc langurs (Pygathrix nemaeus), among the most beautiful and rarest of monkeys in the world. The primate is listed as Endangered on the IUCN Red List of Threatened Species. The most dangerous threat to the species is also hunting for traditional medicine. 
​And the park is Nam Cat Tien National Park in Dong Nai Province, where Yellow-cheeked gibbon and black-shanked douc langur can be found. There has been estimated at about 500 individuals of Yellow-cheeked gibbon divided into 150 groups in this park. The major threat in Vietnam is hunting for the pet trade.