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Rattus norvegicus
10 – 17 oz.
Norway rats can be twice the size of Roof rats
12 – 18″ including tail
Reddish-brown fur, blunt nose, small eyes & ears, thick body
3/4″ long
Various sizes, blunt ends
2-3 Months
23 Days
9-18 Months
6-12 Offspring
Rattus rattus
5 – 9 oz.
13 – 17″ including tail
(7 – 10″ for head & body)
Pointy nose, large eyes & ears, tail longer than body
1/2″ long
Pointed ends
2-3 Months
22 Days
18 Months
6-8 Offspring
Mus musculus
0.75 oz.
6 – 7″ including tail
Pointy nose, large eyes & ears
1/8″ – 1/4″ long
Pointed ends, contains hair
4-6 Weeks
19 Days
15-18 Months
5-6 Offspring
Microtus pennsylvanicus
1 – 2 oz.
Meadow voles can be twice the size of house mice and deer mice
6″ including tail
Stocky round shape, short tail & ears, blunt nose
Elongated 1/8″ – 1/4″ long
Pointed ends, contains hair
4-5 Weeks
21 Days
15-16 Months
4-6 Offspring
Peromyscus maniculatus
0.5 – 1 oz.
4 – 9″ including tail
Large black eyes, white feet, brownish-black-and-white belly
1/8″ – 1/4″ long
Pointed ends, contains hair
6-8 Weeks
24 Days
15-16 Months
4-6 Offspring