Brown Rat
Rattus norvegicus
Conservation Status
Least ConcernMammalia · Rodentia · Muridae
About
The brown rat, also known as the common rat, street rat, sewer rat, wharf rat, Hanover rat, Norway rat and Norwegian rat, is a widespread, common species of rat. One of the largest muroids, it is a brown or grey rodent with a body length of up to 28 cm (11 in) long, and a tail slightly shorter than that. It weighs between 140 and 500 g. Thought to have originated in northern China and neighbouring areas, it has now spread to all continents except Antarctica, and is the dominant rat in Europe and much of North America, having become naturalised across the world. With rare exceptions, the brown rat lives wherever humans live, particularly in urban areas. They are omnivorous, reproduce rapidly, and can be a vector for several human diseases.
Fun Fact
Brown rats laugh when tickled — they emit ultrasonic chirps at 50 kHz that researchers have identified as genuine expressions of joy, and they will seek out the tickling hand for more.
Quick Facts
Habitat
Urban and agricultural areas
Diet
Omnivore
Lifespan
1-3 years
Threats
- Human-Wildlife Conflict
- Climate Change