Muntjac Taiwan and Southern China. They are also found in the lower Himalayas (Terai regions of Nepal and Bhutan) and in some areas of Japan (the Bōsō Peninsula and Ōshima Island). They have been introduced to Britain and Ireland. A large invasive species population of barking deer exists in the United Kingdom. Reeves's muntjac has been introduced to the United Kingdom, with wild deer descended from escapees from the Woburn Abbey estate around 1925. Muntjac have expanded very rapidly, and are now present in most English counties and have also expanded their range into Wales, although they are less common in
Leaf muntjac could be completely wrapped by a single large leaf. It is found in Myanmar and India. The leaf muntjac is uniquely found in dense forests of Myanmar, in the Hukawng Valley region to the Northeast of Putao, hence its scientific epithet, and to the south of the Nam Tamai branch of the Mai Hka River. It is found at an altitude of 450 to 600 m — the transition zone between tropical forests and temperate ones. Its existence in India was first reported from Lohit district in eastern Arunachal Pradesh In 2002, it was reported also to exist in Namdapha