 The Bioko drill is a primarily terrestrial monkey, and will forage in groups for several hours a day on the forest floor, though they will quickly climb trees when threatened by hunting dogs.They have also been observed to engage in intelligent feeding behaviours, such as breaking millipedes in half to suck out the innards, stripping stems in order to consume the innermost pith, and searching pith for larvae.The Bioko drill is also known as a primary seed disperser, contributing to tree dispersal through their consumption of tree seeds and fruits.