Roof rats are also known as black rats, house rats, and ship rats. They are black but can be grey with a lighter color underside. Roof rats have large ears and long tails. Roof rats get their name because they are great climbers and nest in high places like trees and upper parts of buildings. They are nocturnal and most active at night, but it may be a sign that they have young in their nest if you see them during the day.
