 The Bioko drill is considered endangered, and is highly threatened by the bushmeat trade.Primates such as the drill that have larger bodies, are slower growing, and are mainly terrestrial, are considered to be disproportionately affected by hunting, and as of 2009, it was predicted that the drill population on Bioko Island was around 4,000.The mean biomass of Bioko’s forests are being depleted, with larger mammals preferentially hunted, and Bioko drills being intolerant to hunting.