Rattus norvegicus

Color: Gray, brown, or black.
Shape: Long.
Size: 10-12 inches (8-inch body plus 4-inch tail).

With furry brown or gray bodies, Norway rats are large rodents that have small eyes, ears, and short tails. Their ears and tails are typically covered in scales and their tales are often shorter than their heads and bodies.

Habits of Norway Rats

Preferring to nest in underground burrows, when food sources become scarce outside during the fall and winter, Norway rats will use their excellent climbing skills to enter buildings in search of food.

Habitat and Nesting Behavior

Living and thriving alongside humans for centuries, Norwegian water rats arrived in the United States on British ships in the late 1700s. They flourish in large cities and thrive by burrowing beneath buildings, embankments, and tree roots, or hiding out in basements, crawlspaces, attics, and sewers.

Often hiding during daylight hours, Norway rats live in fields, farmlands, and inside structures like woodpiles. Due to their agile frames, these rodents can gain entry to homes through holes the size of a quarter.

Voracious omnivores, rats prefer to feed on meat, fruits, grains, and nuts, but when food is scarce they will also feed on carrion, small fish, and even other rodents. Starting their colonies close to water, rats live together in groups organized by a hierarchy of dominants and subordinates.

Norway Rat Threats

In addition to being carriers of disease, rats can also chew through wiring, causing electrical shorts and fires. Rats are also notoriously prolific. A single rat sighting is often evidence of an entire colony.

Living approximately one year in the wild, these fruitful creatures can have litters of 4-22 babies (called “kittens”), and a single female can have 3-12 litters per year.

How to Get Rid of Norway Rats

Whether they are inside or outside a home, getting rid of Norway rats means reducing their opportunities to fulfill their three most basic needs: food, water, and shelter.

To get rid of rats quickly, make sure garbage cans are covered and emptied often, clean up outdoor bird and pet feces, and fix plumbing leaks and outdoor sources of standing water.

Remove debris piles, keep firewood stored away from structures, and trim any tree limbs that come in contact with your home. Remember to seal any holes larger than ¼ inch, like those that can be found near windows and doors, dryer vents, and chimneys.

If you have or suspect that you have a rat infestation, seek professional help for the fastest, simplest eradication possible.

How Can You Identify a Rat Infestation?

Since Norway rats are not typically active during daylight hours, a sighting during the day could signal a large infestation. As they often dig holes in lawns, outdoor burrows surrounding a building can indicate Norway rat nests, while other signs include grease stains and chew marks on food or utility lines. Norway rats can also leave capsule-shaped droppings along frequent pathways. If you see chewed wires or droppings, contact a professional for a rat eradication plan. We offer whole-home inspections so that you don’t have to wonder whether your home is infested or wait until the infestation gets out of control.

If you suspect a rat problem, contact Rochester Pest Pro for a quote.

Rochester Pest Pro, Inc is based in Henrietta, NY and proudly serves the pest control needs of businesses and residents throughout the entire Rochester area.

We can be reached by phone at 585-486-4815 anytime during regular office hours, or 24/7 by writing to us through our website’s contact page.

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