House Mice are very small, about 2 inches, and can fit through holes as small as a dime. They are gray in color and have very soft fur almost like velvet. Mice are very good climbers, they can climb rough vertical areas and even jump almost a foot. A small mouse problem can escalate very quickly because a female can give birth to a litter every 3 weeks!
Roof rats are black in color and are sometimes referred to as black rats. They are larger than a mouse, length can be 7 to 10 inches and they have larger heads and hind feet. Rats are more destructive than mice, they are also more cautious making them harder to trap.