Vietnam: A Natural History, Eleanor Jane Sterling, Martha Maud Hurley, Le Duc Minh, Yale University Press, 2006, ISBN 978-0-300-10608-4, ... The species known to be extinct in the wild in Vietnam are the cally Endangered Kouprey, Wild Water Buffalo, and the Vietnamese Deer (Cervus nippon pseudaxis), although 8,000-10,000 Sika Deer are in farms in Nghe An and Ha Tinh ...
