Norway Rat

Rattus norvegicus

Large, robust rodent found throughout the U.S., particularly within cities and on farms.

Description:

The Norway rat indirectly killed millions of people during the Middle Ages in Europe. The primary result of transmission of the Bubonic Plague was from infected rats fostering fleas. These ?carrier? fleas spread the disease to humans, in turn causing death. It is hypothesized that Norway rats were introduced into the United States in the early 1700?s via trading ships and have since spread across the country with the largest, most concentrated rat populations occurring within inner cities.

Biology and Behavior:

• Large, usually grayish rodent 16 inches long; weight range of 12-16 ounces.
• Three week ?pregnancy? period; averages 8-9 offspring per litter
• Prefer grains, seeds and insects as food sources but will consume almost any food
• Consume an ounce of food per day and are highly dependent on water sources
• Neophobic: meaning they are wary of new objects and foods in their environment 
• Can squeeze through 1/2-inch cracks and gaps 
• Most live less than one year

Control Tips:

• Place dog food, birdseed and human food inside rodent-proof containers
• Keep shrubs, vines and tree limbs trimmed away from structure
• All gaps should be less than 1/2-inch to prevent entry
• Door thresholds and frames fitted with gaskets or brush shields 
• Utility openings sealed with sealant or pipe collars (escutcheon plates)
• Do not use expanding foam to seal openings as rats can chew through it
• Do not stack lumber, firewood, bricks, pipes or other debris next to foundation
• Vents (attic, crawl and dryer) covered with mesh screen (< 1/2-inch)
• Storage areas organized and ?clutter-free? with access to perimeter walls
• Garbage should be removed daily and stored outside in closed containers
• Food spills and soiled dishes should be cleaned promptly

Action Pest Control Services

• TermaPest^®
• Commercial/Industrial Pest Management Services
• Pest Proofing