Norway Rat


Actual Size: 16” long including the tail

Characteristics: Robust bodies. Typically grayish-brown can be reddish-brown to blackish.

Habitat: Known to create 6.5 feet long burrows along property lines and gardens. Will nest in basements and crawl spaces of homes.


  • Norway rats are most active at night.
  • They typically nest in burrows or pre-existing holes outdoors.
  • They gain access through quarter-sized holes, and beneath exterior doors.

Norway Rats in Baton Rouge LA

Norway rats are known for being some of the bigger rats. Not only are they stockier than their roof rat and black rat cousins, they also are more aggressive! These rats are commensal rodents, which means they live near and are dependent upon humans for survival. The Norway rat will eat just about anything, but they prefer to go for cereals, meats, fish, nuts, and some fruits. Norway rats are most commonly seen at dawn and dusk, but may be seen during the day in serious infestations. The gnawing activity of Norway rats can cause considerable damage to homes, gardens, and structures. Norway rats are carriers of serious diseases, including jaundice, rat-bite fever, and salmonella.

Norway Rat Habitat

Norway rats are ground burrowing animals and construct burrows that are 2 to 3 inches in diameter and up to 6.5 feet in length. Burrows are constructed outdoors beside foundations and gardens. Norway rats are nocturnal and will enter homes at night in search of food, returning back to their burrow.  If nests are found inside homes, they are typically in basements and crawl spaces. When there is a serious Norway rat infestation, the rats will resort to nesting in the upper levels of a home or structure.

Norway Rat Behaviors, Threats or Dangers

Norway rats are known to be one of the more dangerous types of rodents. They can damage foundations, slabs, garden crops, and plants with their burrowing habits. Inside, they will endlessly gnaw to find food and shelter. In serious cases, they can cause extensive damage when they nest inside of walls and attics. Rats can chew on electrical fires; when these wires are exposed, they can spark and cause interior walls to catch on fire. Needless to say, this can be extremely dangerous. When foraging for food, these rats consume and contaminate food meant for humans, pets, and livestock. Salmonella, leptospirosis, and rat-bite fever are among the dozens of diseases spread by Norway rats.

If you have a Norway rat infestation in your Baton Rouge property, contact your local rodent pest control pros as soon as possible.