Rattus norvegicus

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Rattus norvegicus (Lithuania) (click on image to enlarge it)
Source: Wikimedia Commons

Rattus norvegicus Berkenhout - (Norway rat)

The Norway rat is one of the most invasive mammals which is apparently native to north-eastern Asia and now has a world-wide distribution. This includes most of the island archipelagoes. It is an important agricultural and urban pest, damaging crops before harvests and in stores or creating hygienic problems. It often carries disease agents like Leptospira or Rickettsia. In addition, it is an environmental pests and has caused the extinction of many vertebrate species (especially birds) through predation or disease transmission.

Vernacular names
• Deutsch: Wanderratte
• English: Norway rat
brown rat
• Español: rata parda
• Français: rat brun

The Norway rat is brown and slightly larger than the black rat, see the illustration below for other differences.

For details see the respective page in Wikipedia.