Norway rats are fairly husky, brownish rodents that weigh about 11 ounces. Their fur is coarse and mostly brown with scattered black on the upper surfaces. The underside is typically grey to yellowish-white. Rats will eat nearly any type of food, but they prefer high-quality food such as meet and fresh grain. Rats have litters of 6 to 12 young, which are born 21 to 23 days after mating.
Young rats reach reproductive maturity in about three months.
Breeding is most active in spring and fall. The average female has 4 to 6 litters per year. Rats can live for up to 18 months, but most die before they are one year old. Woodbase Snap Traps 2. Live Traps 3.