Gray Shank Duek
Gray shanks are two kind of Old World monkeys. In 1997, it was recorded as a subspecies of red duck duck, but later it was named as an independent species. Origin of this species is found in Vietnam, such as Chonnam Province, Quang Ngai Province, Binh Dinh Province, Lingnan Province and Zalai Province. The total population is estimated at 600 to 700. On July 3, 2007, according to the report of the World Conservation Fund and the International Environment Conservation Society, the number of individuals is increasing, and 116 animals are found only in central Vietnam.