Rats and mice both enjoy a comfortable environment as much as anyone else and the attraction of shelter, a warm abode and the possibility of nutrition nearby will attract rodents in to your home or place of work.
Although both rats and mice breed all year round, their activity and presence is not so much of a problem in the warmer months when they live outside. Pest control for rats and mice increases significantly throughout the autumn and winter time. Often spanning as far as late spring where nesting and breeding peak and the outdoor environment is still temperate.
Rats and mice enter the home and business for two main reasons, shelter and nutrition. Rats in general but certainly not the rule are found in areas of the home or business which do not frequent human activity. Rats are by nature cautious and will remain well out of reach of human threat. This can change where rats have frequented areas and have marked or claimed their territory, usually after a period of a lack of control or human interactions. Mice on the other hand are more human friendly, although skittish and in fear will dash into hiding. Mice will seek food and shelter much closer to human habitation.
Both Mice and rats are prolific breeders and even in hostile conditions, they will multiply constantly, so a good program of professional pest control is often required for successful mouse and rat eradication. Three main species exist in New Zealand.