Common Rodents

Norway Rat

Norway Rat

  • Has a heavy body. Tail is shorter than head and body combined. Total length may reach 18 inches. Weighs up to about 1 lb.
  • Lives and nests in underground burrow system.
  • Also lives in sewers, buildings, basements, and creek banks, waterfronts, under blackberry vines and under woodpiles.
  • Eats garbage, pet food, fruits, nuts, grain, vegetables and meat scraps.
  • Evidence of Norway rats includes large droppings (up to ¾ inch in length), open burrows; rub marks along walls (especially along the base), and gnawing.

Roof Rat

  • Has a slender body. Tail is longer than head and body combined.  Total length may reach 12 to 17 ¾ inches and weighs up to ¾ lb.
  • Nests above ground.
  • Lives in ivy and wild blackberry vines.  Also lives in attics, garages and woodpiles.
  • Climbs trees, shrubs, vines, utility poles, and wires.
  • Eats fruit, berries, snails, pet food, nuts, and vegetables.
  • Roof rat evidence includes droppings (up to ½ inch long), chewed walnut shells and snail shells, rub marks on inside walls, especially around ceiling rafters, and gnawing.

House Mouse

  • Has a small, slender body. Tail is about as long as the head and body combined. Total length is approximately 2 1/2 to 3 3/4 inches long. Weighs up to about 1 oz.
  • Lives and nests in close proximity to humans.
  • Mice can fit through openings as small as 1/4 inch in diameter.
  • Mice eat the same food as humans and require less than 1/10th ounce of water daily.
  • Mice have poor vision, but a keen sense of smell, taste, hearing and touch.
  • Mice are good climbers, easily climbing rough stucco or board walls, drains, pipes and other additions to outside building walls.
  • Evidence of House Mice includes droppings about 1/4 inch long and pointed, urine stains, smudge marks along runways, tracks on dusty surfaces or in mud, gnawing marks, squeaking, sounds of gnawing, clawing, climbing or running in walls and attic area.