House mice are small and slender, three to four inches long, with large ears, small eyes and pointed nose. They are usually light brown or light gray. House mice droppings are rod-shaped. The house mice will nest within structures and burrows. These rodents establish a "territory" near food sources that are generally 10 to 30 feet from nest. House mice are very good climbers. House mice can squeeze through a hole that is 1/4-inch wide. This rodent is a carrier of many serious diseases.
Norway rats are brown, heavy-bodied, six to eight inches long, with small eyes and ears and a blunt nose. The tail is shorter than the head and body. Its fur is shaggy. Droppings are capsule-shaped. These rats nest in underground burrows, from which they enter buildings in search of food. Norway rats tend to hide during the day. They have limited agility, but are excellent swimmers. This rodent can carry many serious diseases.
The roof rat is black or brown, seven to 10 inches long, with a long tail, large ears and eyes, and a pointed nose. Their body is smaller and sleeker than a Norway rat. A roof rat’s fur is smooth. Roof rats nest inside and under buildings, or in piles of rubbish or wood. These rodents are excellent climbers that can often be found in the upper parts of structure. They are very agile; can squeeze through openings only 1/2-inch wide. This rodent is a carrier of many serious diseases.