Roof rats, or black rats, are smaller than Norway rats. They’re agile climbers, live in trees, shrubs and dense vegetation. When they get into houses, they tend to live in ceilings, walls, attics and cabinets. They usually prefer warm climates and are not found in as many areas as Norway rats. Roof rats have dark gray fur, gray to white bellies, pointed muzzles, large ears and scaly tails that are longer than the rat’s body and head combined.