Norway Rats in Illinois and Indiana
Norway rats are extremely territorial, and will even kill mice that compete with them for food and shelter. Their droppings are much larger, around 3/4″, and combined with shed hair and dander can be a significant source of indoor allergens. Norway rats will eat almost anything but prefer cereal grains, meats, fish, nuts, and some fruits. Like most rodents, Norway rats are most active an hour after sunset and just before dawn. The gnawing activity of Norway rats can cause considerable damage to homes, gardens, and structures.
Norway Rat Habitat
In general, Norway rats are ground burrowing animals and construct burrows that are 2 to 3 inches in diameter and up to 6.5 feet in length. Burrows are constructed outdoors beside foundations and gardens. Norway rats are nocturnal and will enter homes at night in search of food, returning back to their burrow. If nests are found inside homes, they are typically in basements and crawl spaces. If a population is large, Norway rats will nest in upper areas of a home or structure.
Norway Rat Behaviors, Threats, or Dangers
Norway rats are some of the most destructive rodents. They can damage foundations, slabs, garden crops, and plants as they burrow and gnaw to find food and shelter. Inside homes, Norway rats may cause extensive damage when nesting in walls and attics. Accounts of rodents starting fires through the gnawing of electrical wires have been widely reported. Chewed, exposed wires inside walls can spark, causing interior walls to catch fire. When foraging for food, these rats consume and contaminate food meant for humans, pets, and livestock. Norway rats are carriers of diseases like jaundice, rat-bite fever, and salmonella.
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