As a commensal species, the house mouse lives in close association with humans (4). In addition to houses, it has been found in a range of urban situations, including shops, mills, warehouses, factories, coal mines and even cold stores. In rural areas it occurs in farm buildings, rubbish tips, piggeries, poultry houses, granaries and open fields (3). They nest in woodpiles, beneath floors, behind rafters and in other concealed locations. In the wild state, the house mouse lives in crevices in rocks or in underground burrows (4).