Brown, heavy-bodied, 14 to 20 centre meters long, with small eyes and ears and blunt nose. Tail is shorter than head and body. Its fur is shaggy. Droppings are capsule-shaped.
Nests in underground burrows, from which they enter buildings in search of food. Tends to remain in hiding during the day.
Omnivorous, but prefers meats. Cannot survive long without water.
Reaches sexual maturity in two months and can breed any month of the year. Litter may number from eight to twelve.
Black or brown, 17 to 25 centimeters long, with a long tail, large ears and eyes, and a pointed nose. Body is smaller and sleeker than Norway rat. Fur is smooth.
Nests inside and under buildings, or in piles of rubbish or wood. Excellent climber that can often be found in the upper parts of structures.
Omnivorous, but shows a preference for grains, fruits, nuts and vegetables.
Becomes sexually mature at four months, producing four to six litters per year that consist of four to eight young each. Lives up to one year.
Small and slender, three to four inches long, with large ears, small eyes and pointed nose. Light brown or light grey. Droppings are rod-shaped.
Nests within structures and burrows. Establish a "territory" near food sources that are generally 10 to 30 feet from nest. Inquisitive, but very wary. Excellent climbers.
Omnivorous, but prefers cereal grains.
Prolific breeders by two months of age. Can have litters as often as every 40 or 50 days, with four to seven young per litter. Lives up to one year.