One of the 11 rats on WAnimals
Mammals · Rodentia · Muridae
Rattus norvegicus
The species is abundant and widely distributed; it faces no significant short-term risk.
The brown rat is a species of myomorph rodent of the family Muridae. It is one of the best known and commonest rats; it is tied to human activity and thanks to that it has colonised the whole world from its origins in China, becoming a pest in some areas. It gave rise to the albino rats and other varieties used by people as laboratory or pet animals. No subspecies are recognised.
Weight
150 g – 500 g
Size
20 cm – 28 cm
Life expectancy
2 years
Diet
Omnivore
Combines animal and plant food depending on availability.
Activity
Nocturnal
Active mainly at night.
Social structure
Colony
Lives in large concentrations, often for breeding reasons.
Sighting difficulty
Easy
Sources consulted: https://es.wikipedia.org/wiki/Rattus_norvegicus
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