About Norway Rat
The Norway rat (Rattus norvegicus), also called the brown rat or sewer rat, is the most widely distributed rat in the world and one of history's most successful synanthropic mammals. Measuring 35–50 cm including the tail, it can squeeze through openings just 12 mm wide and gnaw through plastic, lead, and even some soft metals with its continuously growing incisors. It contaminates far more food than it consumes through droppings, urine, and hair. It is associated with leptospirosis, salmonellosis, rat-bite fever, and murine typhus. Females produce 5–10 litters of 6–12 young per year, making early intervention essential.
Geographic Distribution
This rodent is found across South America, with notable populations in Argentina and surrounding regions.
Management
If you suspect a Norway Rat problem, consult our recommended exterminator services or browse our full pest species database for related species and control guidance.