The greater big-footed mouse is a nocturnal species, and is almost totally arboreal, spending nearly all of the night time in trees. During daylight hours it occupies an underground burrow, which is dug under a large rock or tree stump. These burrows have closed, concealed entrances, and can be recognised by the small piles of soil outside the entrance, thrown up during excavation (2). Like other species belonging to the subfamily Nesomyinae, the greater big-footed mouse is thought to be an herbivore, feeding on fruit, seeds, berries, roots and stems. They themselves are an important food source for a number of snakes, birds of prey and mammalian carnivores (4).