TOM MCHUGH / SCIENCE PHOTO LIBRARY TOM MCHUGH / SCIENCE PHOTO LIBRARY
Norway rat (Rattus norvegicus) feeding on human rubbish. This rodent originated in northern China but is now found in nearly every part of the world. It is commonly associated with human settlements. It is a true omnivore and thrives on the uneaten and spoiled food discarded by humans. The Norway rat is largely nocturnal. When foraging it follows the same route every night. Although it usually travels by land, it is also a good swimmer, jumper and climber. If food is abundant and it has access to adequate shelter, this rat breeds throughout the year. A single female can produce 6-8 litters annually, each with an average of 7 young.
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