"deroceras invadens" typically occurs in disturbed sites (e.g. the most widespread slug species in manchester gardens) and is often easiest to find under rubbish. however, this species has also spread to natural habitats such as woodland and grassland (e.g. in britain, tenerife, south africa and australia). it prefers areas of high humidity and cannot survive temperatures below –7 °c. its distribution appears restricted by low winter temperatures, which could explain its slow and only partial colonisation of central europe and its recent range expansion in sweden following climate amelioration.