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Brown rat - Wikipedia
The 10 Largest Rats In The World - A-Z Animals
Brown Rat - Facts, Diet, Habitat & Pictures on Animalia.bio
List of largest rodents - Wikipedia
Discover the 11 Largest Rats In the U.S. (And Where You ... - AZ …
Norway rat | Smithsonian's National Zoo and Conservation Biology Institute
ADW: Rattus norvegicus: INFORMATION
What's the biggest rat in the world? - Discover Wildlife
Brown rat - Simple English Wikipedia, the free encyclopedia
Brown Rat - Natural Atlas