Indian muntjac that there was some form of site specific dominance Paleontological evidence proves that Indian muntjacs have been around since the late Pleistocene epoch at least 12,000 years ago. Scientists are interested in studying muntjac because between species they have a wide variation in number of chromosomes, in fact the Indian Muntjac has the lowest number of chromosomes of any mammal with males having a diploid number of 7 and females having 6 chromosomes. They are the oldest known members of the deer family, the earliest known deer-like creatures had horns instead of antlers but the muntjac is the earliest known
Reeves's muntjac species except where already established. Colonies exist throughout England south of Derbyshire, and the population continues to grow. In Ireland, sightings in 2008 caused the government, concerned at the risk of the species becoming established, to quickly introduce a year-round hunting season. In the 1960s, several specimens escaped from an exhibition zoo in the Bōsō Peninsula in eastern Japan. By 2017, their numbers had reached at least 60,000. It is considered a harmful invasive species and has inflicted severe damage to ashitaba plantations. Also, Reeves's muntjac escaped a zoo on Izu Ōshima in 1970 when a fence fell due to