Norway rats are large rodents that may weigh in excess of 500 grams. They can reach lengths of 40 cm,and their tails alone may measure 21 cm. The body of the Norway rat is covered in shaggy fur that is brown or gray in color. The ears and tail are covered in scales, and the tail is shorter than the head and body. Droppings are capsule-shaped.
Behavior, Diet & Habits
Norway rats typically nest in underground burrows from which they enter buildings in search of food. They tend to remain in hiding during the day.
Norway rats are omnivorous and feed on a variety of food sources. If given the choice, they will consume meats, fruits, grains and nuts. Dead animals also serve as a food source for these rats, and they are capable of catching small fish and rodents. They require water to drink, and they make their colony as close to a water source as possible. Norway rats live in communities with dominant and subordinate members, though they are not truly social like ants.
The Norway rat reaches sexual maturity in two to five months and can breed any month of the year. Litters may number from four to 22. Females can have three to 12 litters per year. Adults generally live up to one year in the wild.