Recent Examples of brown rat from the Web
Black rats weigh in at 41/2 ounces and grow up to 5 to 6 inches long; adult brown rats weigh 9 to 10 ounces and reach up to 16 inches.
In our study, the commonest wild animal detected in New York City waters was the brown rat, a common urban denizen.
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First Known Use of brown rat
medical Definition of brown rat
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