Director of the nature reserve Bach Thanh Hai said the species comprise Nycticebus coucang, Nycticebuspygmaeus, red-faced monkey, pig-tailed monkey, golden monkey, white-cheeked gibbon, brown-shanked douc langur, and Ha Tinh langur.
Of these species, two are fully investigated, including the white-cheeked gibbon with 309 individuals, and between 413-419 brown-shanked douc langurs.
These are species that are classified as endangered by the International Unionfor Conservation of Nature (IUCN)./.