QUICK STATS:
Color:
Brown with scattered
black hairs; gray to
white underside
Shape:
Long, heavily-bodied, blunt
muzzle, small ears and eyes
Size:
7 - 9 1/2 inches long
Region:
Found throughout the U.S. as well as Southern Ontario
OVERVIEW:
Norway rats can cause damage to property and structures
through their gnawing. They are also a vector of diseases and
can contaminate food. Believed to be of Asian origin, Norway
rats are now found throughout the world.
PREVENTION:
• Eliminate sources of moisture, especially in crawl
spaces and basements.
• Fill any gaps or cracks on the outside of your home
with silicone caulk.
• Store food in tightly sealed containers.
• Keep kitchens tidy by sweeping crumbs off of
floors and wiping counters.
• Remove clutter to reduce nesting spots.
• Inspect your home for signs of an infestation, including
rodent droppings, gnaw marks and damaged goods. Look for
greasy rub marks caused by their oily fur.
• If you suspect an infestation, contact a licensed
pest professional.
HABITS:
Norway rats are primarily nocturnal. Outdoors, they burrow in
soil near stream/river banks, piles of garbage or under concrete
slabs. Norway rats are social and often build burrows close
to one another. Indoors, they often nest in basements, piles
of debris or undisturbed materials. They are known to gnaw
through almost anything – including plastic or lead pipes – to
obtain food or water.
THREATS:
Norway rats can cause damage to structures and personal
property through their gnawing and eating. They can also spread
diseases including plague, jaundice, rat-bite fever, cowpox
virus, trichinosis and salmonellosis. In addition, these rats can
introduce fleas and mites into a home.
DID YOU KNOW? Norway rats…
• tend to follow the same pathway from their nest to
food and water.
• can gain entrance to a structure through any opening
larger than 1/2 inch.
• usually have an “emergency exit” built into their burrows