Also known as Barn Rat, Brown Rat, Common Rat, Gray Rat, Sewer Rat, Water Rat, Wharf Rat.
Body Shape/Size: Heavy, thick, large
Max. Body Wt.: 18 oz.
Nose Shape: Blunt
Ears: Small, covered with hairs, cannot reach eyes
Eyes: Small
Tail Color: Dark colored above, pale beneath
Tail Length: Shorter than head and body combined
Droppings: Rounded, blunt ends. Capsule shaped. About 3/4″ in length.
Nests: Mainly in burrows. Prefers to live on the ground in holes under vegetation, edges of sidewalks, driveways and patios.
Foraging Range: Up to 300 ft.
Days to Maturity: 60 – 90 days
Number of Young per Litter: 8 – 12
Number of Litters per year: 3 – 6
Food Habits: Omnivorous (plants and meat), eats about 1 oz. per day. Shy, has new object reaction.
Water Needs: Must find water or consume foods with a high water content on a regular basis.
Climbing Ability: Can climb when necessary.
Swimming Ability: Excellent swimming ability.
Minimal Crawl Through Opening: Capable of squeezing through a space as small as 1/2″ inch in diameter.
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Napa County Mosquito Abatement District is fully committed to providing accessible facilities, elements and
channels of communication to all members of the public. As part of this commitment, Napa County Mosquito Abatement District
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