The Norway Rat prefers to feed on meats, fish, flour, fruits, vegetables...meaning it will eat almost any human consumed food!!! The Norway Rats will consume about 1 oz of food per day and about ¾ of an oz of water, and produce anywhere from 30 to 180 droppings; there are from 6 - 18 pups in a litter, and 3 – 7 liters per year; adults live about 18 months.
The Norway rat usually nests in basements & lower portions of buildings. They quite often burrow in the soil and have extensive runs. The Norway rat is active primarily at night; They are fair climbers but good swimmers; Rats are suspicious of changes in the environment or new foods, for this reason it may take a couple of days for traps or poison baits to take. Rats are nocturnal, with their peak activity at dusk or before dawn. When the population is large or they are disturbed or hungry, you can see activity during the day.