brown rats

Sewer-dwelling rodents

Brown rats are the common rats found worldwide in close association with humans—in sewers, buildings, farms, and garbage.

They are the species used in laboratories and kept as pets.

Despite the name, their fur ranges from gray to brown.

Also called Norway rats, though they likely originated in Asia, not Scandinavia.

Related

rodenticide · incisors · zoonosis · infestation · plague · food scraps · rattrap · pest control · animals · species · mammal · invasive species · commensalism · urban wildlife · folklore · furs · vertebrate · population control

Categories
Opposites
rat species/coloration

brown ratsblack rats

Dark-furred house-infesting rodents

roof rats · house mice

pest vs. beneficial animals

brown ratshoneybees

Colonial insects producing wax

pollinators · beneficial insects · barn owls · earthworms · pest controllers

wild vs. domesticated rodents

brown ratsfancy rats

Domesticated rat varieties

laboratory rats · guinea pigs · hamsters

Family

brown, rat, browns, browned, browning, brownish, brownness, rats, ratty

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Concrete · Negative · Everyday, not technical · Rated G