The Bornean yellow muntjac  is a muntjac deer species, endemic to the moist forests of the island of Borneo. It lives alongside the common muntjac. It is similar to its much more common cousin and was only recognised as a separate species in 1982. Apart from the color difference, its antlers, which are just 7cm in length, are smaller than those of the common muntjac (or red muntjac, click here to read about the red muntjac). Its yellow back, helps differentiate it from the red muntjac (common muntjac). First described in 1982 it has not been extensively studied and has been described as a relict species. This muntjac species is a potential prey of the Bornean tiger (a potential top species, though its existence has never been fully proven to exist), without this species, the apex predator of Borneo is the clouded leopard – an impressive, if smaller big cat (it is indeed classed as a big cat).

It is currently listed as not threatened, and is found throughout Borneo

Its conservation status is considered least concern, though the population is decreasing. Having said this, given the lack of dedicated study, we do not really know what is going on.