The reserve was established in 1986 and later expanded to a total are of 37,000 ha, Phu Quoc Nature Reserve with diverse flora and fauna covers mainly the mountainous northern part of the island. There are nearly 929 tree species of which 19 newly-found species are first recorded in Vietnam. The forest is home to many species of birds and small mammals (flying squirrels, sloth-monkeys …) As explained by the French Larousse dictionary, the famous Phu Quoc dog is a well-tamed wild canine species which has become hunters’ favorite companion. Trekking through the park should be done in the dry season only.