Roof Rat 

Norway Rat

Other Names: Black Rat, Fruit Rat, Ship Rat, Alexandrian Rat

If there is plenty of food and shelter, Roof Rats will gladly live in close proximity to humans, particularly in attics, ceilings, or wall areas. Roof rats inhabiting upper areas of buildings or homes often gnaw on wires found there, possibly leading to fires, outages, and production down-time.


Description | Reproduction | Diet | Habitat

Description of the Roof Rat 

Rattus Rattus

Black to brownish-gray; hard to identify by color alone

6-12 ounces; smaller than Norway Rat

6-8 inches

7-10 inches; longer than the body

Thin, slender body, pointed nose

Relatively small; close to body

Large & prominent eyes; color blind

5 to 18 months

½ inch long with pointed ends; dark color; found scattered

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Reproduction of the Roof Rat 

4-8 pups per litter

3-4 per year

2-3 months

22 days

Indoors: All year; Outdoors: Spring & Fall

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Diet of the Roof Rat 

0.5-1 ounce

1 ounce

Fruits, berries, meats, seeds, vegetables, eggs

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Habitat of the Roof Rat 

Nearby coastal cities; as a general rule they do not occur more than 100 miles inland

Nests in attics, false ceilings, dead fronds of palm trees, and upper portions of buildings

Up to 300 ft. from nest

Nocturnal; most feeding occurs 30 minutes after sunset and before sunrise

Rat Habitats

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