Also known as the ship rat or roof rat, the black rat (Rattus rattus) was introduced to Britain with the Romans. Generally smaller than the brown rat (Rattus norvegicus), the black rat is typically a uniform black to tawny brown colour, with lighter underparts. The tail, which is longer than the head and body, is hairless, and is used for balance.
Finder the Black Rat (Daveed Diggs)