||Brown with scattered black hairs; gray to white underside
||Long, heavily bodied; blunt muzzle
||7-9 ½ inches long
||Found throughout U.S.
|Download the Norway Rat Pest I.D. Card
Norway rats are believed to be of Asian origin, but are now
found throughout the world. These rats can cause damage to
properties and structures through their gnawing. Norway rats have
smaller eyes and ears and shorter tails.
Norway rats are primarily nocturnal and often enter a home in
the fall when outside food sources become scarce. These rats are
known to gnaw through almost anything – including plastic or lead
pipes – to obtain food or water. Norway rats are social rodents and
build burrows close to one another.
Outdoors, Norway rats live in fields, farmlands and in
structures. These rats frequently burrow in soil near riverbanks,
in garbage and woodpiles, and under concrete slabs. Indoors, Norway
rats often nest in basements, piles of debris or undisturbed
materials. Rodents can gain entry to a home through a hole the size
of a quarter.
Norway rats can cause damage to structures through their gnawing
and eating. These rats are also vectors of diseases including
plague, jaundice, rat-bite fever, cowpox virus, trichinosis and
salmonellosis. In addition, Norway rats can contaminate food and
introduce fleas into a home.