This is the most commonly encountered rodent. They are not only a nuisance, but they also damage/destroy materials by gnawing, and eat and contaminate stored food, they are also carriers of disease. It is thought to be of Central Asian origin, but is worldwide now. Adults have a head and body length of 2.5-3.5” and a tail length of 2 3/4 to 4” and are usually dusty gray to light gray. Their preferred nesting sites are dark, secluded places where there is abundant nesting material nearby and little chance of disturbance. Nesting materials include paper products, cotton, packing materials, insulation, fabrics, etc. They are nibblers and will eat just about anything, but their preferred foods are seeds. They are nocturnal in habit and only need an opening 1/4" or greater to gain access. Treatments include baiting, trapping and glue boards.
This is the largest of the rodents. An adult has a combined head and body length of 7-9.5” and a tail length of 6-8”. They have a brown coat with scattered black hairs. They have small eyes and ears. They are nocturnal and cautious. They will eat almost anything but prefer meat, fish and cereal. If the food they eat is disagreeable to them they are quick to develop food/bait shyness. They will gnaw through almost anything to gain access to food and water, even plastic or lead pipes. They need an opening of greater than 1/2" to gain entry. Treatment includes baiting and trapping.
This rat is smaller than the Norway rat with a combined head and body length of 6-8” and a tail length of 7-10”. They are usually brown with black intermixed to gray to black. They have large eyes and ears. They are nocturnal and cautious. They will eat almost anything but prefer fruits, vegetables and cereals. Once they find an acceptable food, they will eat their fill at one sitting and return time after time. They only need an opening of 1/2" or greater to gain entry. Treatments include baiting and trapping.