A source for information on
Norway Rat Rattus norvegicus
Larger rodents that may grow to a body length of 10 to 12 inches. Seldom will
a rat weigh more than one pound.
Can vary from gray to brown to black.
Few people really like rats or mice, and no one wants them in their house.
Rodents live everywhere outside and could enter at any time, but fortunately, this does not occur often.
Usually, most home invasions occur in the fall, not because of cooler weather, but because the seeds and plants
on which rodents feed outside are gone. Rats and mice must then seek new food sources. Unfortunately, one of
these sources may be your home. Rats are excellent climbers and are capable of gaining entry through holes
around soffit vents and around cables entering the building, through holes in gable vent screens, and through
turbine and box vents on roofs. Many garage doors on homes allow enough space for rats to fit underneath, as
Outside, rats live in fields, wooded areas, vacant lots, farms, and just
about anywhere people have buildings. Rats are seldom a problem in homes except in urban and rural areas. This is
due in large part to their size, since rats need a hole about the size of a quarter in order to gain entry into a
building. Rats however, may find harborage in many areas around the home - especially in stacked firewood, stones
and bricks, and piles of leaves or other debris
Brown, heavy-bodied, six to eight inches long, with small eyes and ears and blunt
nose. Tail is shorter than head and body. Its fur is shaggy. Droppings are capsule-shaped.
Nests in underground burrows, from which they enter buildings in search of food.
Tends to remain in hiding during the day.
Omnivorous, but prefers meats. Cannot survive long without water.
Reaches sexual maturity in two months and can breed any month of the year. Litter
may number from eight to twelve. Females can have four to seven litters per year. Adults live as long as one
The best way to avoid invasions of rats is to (1) provide as little harborage as
possible that might attract rodents, and (2) seal as many holes and cracks in the outside of the home as possible
through which rats might enter. The following recommendations should be followed to help prevent rats from seeking
the food and shelter provided by your home:
- Keep firewood stored as far from the home as possible and store it off the
ground. During the winter, store only enough wood next to the house to burn every couple of days.
- If possible, remove any piles of debris, stones, bricks, etc. If these are
near the foundation of the home they serve as harborages to attract rodents. Once there, it is any easy step
for rodents to enter the building itself.
- Seal any hole or crack larger than 1/4 of an inch. Large holes or cracks
should be stuffed with steel wool or wire mesh before sealing with caulk or foam, otherwise rodents could chew
through to enter.
- Install a good, thick weatherstrip on the bottom of all doors to prevent
rodents from entering. The garage door may prove difficult to seal completely, so the door from the garage to
the house must be sealed tightly.
- Remember, our service includes coverage of commensal rats and mice, and much
of the service provided during the colder months is to inspect for signs of rodents and to maintain preventive