Is more common in the northern section of the United States. The Norways are more commonly found underground, in subways and sewers and such. The House Mouse is found everywhere, but seems more common in the north. All of these rodents thrive in urban areas and love to live in human buildings and houses. They use human garbage (and pantries) as sources of food. All of these rodents are carriers of several diseases that can infect humans and pets. They contaminate homes and attics. The only way to permanently solve a rat problem is to find out how the rodents are gaining access to the inside of the building, and fix those openings. Then the remaining rats inside have to be trapped and removed.