Rats Identification Guide

Rattus norvegicus

Rats are common household pests that can cause significant structural damage and spread disease. The Norway rat is the most prevalent species in the United States, known for burrowing near foundations and invading basements.

Taxonomy

Kingdom: Animalia Phylum: Chordata Class: Mammalia Order: Rodentia Family: Muridae
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Norway rat showing its characteristic brown fur and blunt snout

Rats Coloration

Common color patterns to help identify rats

Brown
Gray
Dark Brown
Quick Identification

Rats

High Property Risk
Size
150–280 mm
Type
Rodent
Legs
4
Wings
No
Cannot fly

Seasonal Activity

When rats are most active throughout the year

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
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Dec
None Low Moderate High
Photo Gallery

Rats Identification Guide

Physical Characteristics

Rats are larger rodents with distinct physical traits that make them easy to differentiate from mice. Their bodies typically range from 6 to 10 inches long, with tails that can be just as long as their bodies. They have blunt snouts, small eyes, and large ears. Rat droppings are about 1/2 inch long, dark, and capsule-shaped, helping to distinguish them from mouse droppings, which are smaller and pointed at the ends.

Common Species

  • Norway Rat (Rattus norvegicus) - Also called the brown rat, this species is larger and typically found burrowing near foundations or in basements.

  • Roof Rat (Rattus rattus) - Also called the black rat, this species is more agile and prefers attics and high places.

Rats Behavior and Biology

Rats reproduce quickly, with a single pair capable of producing hundreds of offspring in a year. Their ability to chew through wood, plastic, and even soft metals allows them to gain access to homes with ease. Rats are primarily nocturnal and will eat nearly anything, making them highly adaptable to different environments.

How We Treat for Rats

We follow a 4-step rodent protocol to ensure effective control:

  • Inspection - Our licensed technicians conduct a full inspection to locate hot spots where rats are active. This includes looking for droppings, gnaw marks, and potential food sources like pet food and birdseed.

  • Rodent Bait Stations - We place tamper-proof bait stations in key areas to reduce the population effectively.

  • Follow-Up Visits - We return at intervals (typically at 1 and 3 weeks) to assess bait consumption and adjust the plan as needed.

  • Long-Term Maintenance - To prevent reinfestation, we recommend ongoing quarterly service to monitor and manage rodent activity.

Additional methods we use:

  • Snap Traps - Ideal for quick population reduction, especially inside homes where baiting might lead to odor issues.

  • Exclusion Services - Sealing entry points is considered for long-term rodent proofing but is not the primary form of control.

Other Rodents

Explore other species in the rodents family

Commonly Confused With

Rats are often mistaken for these similar pests

Where Rats Are Found

Hover over states to see their names. Green regions indicate where rats have been reported.

Present (73 regions)Not reported
US: 51Canada: 10Mexico: 12

Common Questions about Rats

How do I know if I have a rat problem?

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Look for droppings, gnaw marks on food packaging, scratching noises in walls or ceilings, and grease marks along walls where rats travel.

How quickly can rats reproduce?

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A single female rat can produce up to 12 litters per year, with each litter containing 6-12 pups. If left unchecked, an infestation can grow rapidly.

What's the average cost of rat treatment?

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One-time services typically range between $250-$400, while ongoing prevention plans start at $39/month after an initial setup fee.

Do you seal up entry points to keep rats out?

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Exclusion can be part of a long-term control plan, but we focus on eliminating the infestation first to avoid trapping rodents inside walls.

What if I still see rats after treatment?

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If you're on a recurring plan, we provide free unlimited callbacks to retreat the issue until we achieve control.

Why don't you just use traps instead of bait?

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While snap traps are used inside, bait stations are more effective for reducing populations outdoors before they enter your home. Rats are also neophobic (afraid of new things), so traps alone often take longer to be effective.

George Schulz
About the Author
George Schulz

With five years of hands-on experience in the pest control industry, George Schulz is a registered technician with the Virginia Pest Management Association and a proud third-generation professional in a family business that's been protecting homes for over 57 years. He manages and trains a team of service pros while also leading internal research efforts—recently spearheading a deep-dive review of thousands of documents on pest control materials to hand-pick the most kid and pet friendly, most effective solutions tailored specifically for homes in the DC metro area.

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