When used bait should be in tamper-proof bait station and in areas that are not accessible to children. Snap traps and glue board as can be placed inside bait stations to keep them away from children. The Norway rat, house mouse, and deer mouse are the most common rodent problems in Wisconsin. Proper identification is needed before control is started because the pest management program will differ for each species. In general, Norway rats are large, robust rodents with a blunt muzzle, small eyes, and short, rounded ears.
Coloration is grizzled reddish to grayish brown with a gray to yellowish-white belly.
They may range in size from 7-18 ounces and reach 11 inches at maturity. Their tails are hairless and shorter than their head and body. The house mouse is smaller and more slender than the Norway rat. Its eyes are small and ears are quite prominent. The muzzle is pointed.