Norway Rat
What Are Norway Rats?
The Norway rat commonly referred to as the street or sewer rat, is believed to be of Asian origin, arriving in the U.S. on ships from other countries in the 1700s. Today, Norway rats are found throughout the world. Norway rats have fairly poor vision and are colorblind. Despite this, their other senses, including hearing, smell, touch and taste are keen. Although not extremely agile, they are capable of running, climbing, jumping and swimming. Norway rats are known to cause damage to properties and structures through their gnawing.
Scientific Name(s)
- Rattus norvegicus (Norway rat)
Description
Norway rats, also known as brown rats, are large, burrowing rodents that are typically brown or gray with lighter undersides. They have a robust body, long, scaly tails, and large, sharp teeth. These rats are known for their adaptability and are often found in urban environments, seeking food and shelter in homes, basements, and sewers.
Habitats
- Basements and crawl spaces
- Sewers and storm drains
- Attics and inside walls
- Under appliances and near food storage areas
- Around foundations, particularly in areas with easy access to water or food sources
FAQs
Why do I have Norway rats in my home?
Norway rats are attracted to food, water, and shelter. Common causes of an infestation include open entry points around doors or windows, easy access to garbage, and unsealed food sources inside your home. If you’re noticing signs of rats, it’s important to address the issue quickly to prevent further damage and contamination.
Are Norway rats dangerous?
Yes. Norway rats can transmit harmful diseases like Salmonella, E. coli, and leptospirosis. They can also trigger allergies and asthma, especially in sensitive individuals, and cause significant property damage through their gnawing and nesting behaviors.
How quickly can Norway rats multiply?
Very quickly. A single female Norway rat can give birth to up to 12 litters a year, with each litter containing 6 to 12 pups. This rapid reproduction rate can lead to large infestations if left untreated.
