Muntjac

A muntjac is any small deer that genus "Muntiacus". 
Muntjacs may be the oldest known deer, appearing 15-35 million years ago, with remains found in Miocene deposits in France and Germany.
This genus is native to Southeast Asia and can be found in India and Sri Lanka to southern China, Taiwan, Japan and Indonesian islands.
Two species were originally recognised: the barking deer is "Muntiacus vaginalis" and Reeves's muntjac is "Muntiacus reevesi". More recently, ten more species have been recognised, all from Asia.