 The burrow system consists primarily of foraging tunnels, which the rats dig in search of food.While particularly large tubers and bulbs are at least partially eaten where they are found, smaller ones are dragged to food storage chambers beneath the foraging tunnels.The foraging tunnels are typically only beneath the soil, but are connected to a smaller number of deep tunnels that lead down to the storage chambers, latrines, and a central nest that may be as much as underground.