Norway Rat

Rattus norvegicus

Color: Gray or brown

Size: 20-25cm

Weight: 200-500grams

Shape: Head broad, Ears round

Diet: They consume plant and animal foods

Habitat: Worldwide, native Asia

H.G. Scott, CDC - This media comes from the Centers for Disease Control and Prevention's Public Health Image Library (PHIL), with identification number #2611.

What are Typical Norway Rat Behaviors?

They are active at night. It is a social animal. They communicate with voice, body language and smell. They clean themselves frequently.

They like to hoard food. They hoard food in hidden areas for later consumption.

They test small amounts of food first to avoid poisoning.

They usually nest in burrows. They prefer to be close to water sources. They build a large nesting system in the soil. They use wall cavities and roof areas inside buildings.

They are curious but also cautious. They exhibit aggressive behavior when they perceive a threat. Although they are usually timid, they can attack and escape.

Their reproduction rate is very high. Their ability to navigate mazes and problem-solving skills are quite high. They are very good swimmers, climbers and runners.

What are the Risks to You from Norway Rats?

Health Risks:

Leptospirosis,
Salmonella,
Plague,
Rat-bite Fever,
Lymphocytic Choriomeningitis Virus (LCMV),
Allergens,
Food Contamination,
Structural Damage,
Infestation and Hygiene Issues,
Psychological Impact,

How Can You Prevent Norway Rats?

Openings accessible to the area should be covered with products such as steel wool, cement mixed with glass shards, putty, etc.

Ventilation hatches should be covered with metal gratings.

Skirting boards under the door should be covered with insulation materials.

Food residues should not be left and should be kept clean.

Water sources should be dried.

Pet food should not be left outside the building.

There should be no clutter in areas such as warehouses. Floor and wall bottoms should be stacked visibly.

The floor parts of drywall walls that are connected to the outdoors should be covered with metal or ceramic tiles.

Close openings around the installation.

Regular traps should be set and monitored at entry points.

Make sure that outdoor vegetation is short.