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Learning About the Pest - Important Facts About Mice and Rats

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Learning About the Pest - Important Facts About Mice and Rats

Norway rat sits on a tree branch.

Purestock, Courtesy of Getty Images

The Tale of the Tape for Common Rat and Mouse Adults:

Norway Rat: Heavy and Thick body, weigh 11 ounces or 300 grams
Roof Rat: Light and Slender Body, weigh 7 ounces or 200 grams
House Mouse: Small Head, Small Feet, weigh 0.5 ounce or 15 grams

Snout Shape of Common Rat and Mouse Adults:

Norway Rat: Blunt
Roof Rat: Pointed
House Mouse: Pointed

Ear Size and Hair of Common Rat and Mouse Adults:

Norway Rat: Short, Dark Hairs
Roof Rat: Large, No Hair
House Mouse: Large, Some Hair

Tail Coloration of Common Rat and Mouse Adults:

Norway Rat: Dark Above, Pale Underneath
Roof Rat: All Dark
House Mouse: All Dark

Fur Color and Characteristics of Common Rat and Mouse Adults:

Norway Rat: Brown with Black Shading, Shaggy Coat
Roof Rat; Grey with Black Shading, Smooth Coat
House Mouse: Light Brown with Grey Shading

Shape of Common Rat and Mouse Adult Feces or Droppings:

Norway Rat: Capsule-Shaped
Roof Rat: Spindle-Shaped
House Mouse: Rod-Shaped

Daily Food Requirements of Common Adult Rats and Mice:

Norway Rat: 1 ounce or 28 grams
Roof Rat: 1 ounce or 28 grams
House Mouse: 0.1 ounce or 3 grams

Nest Locations of Common Adult Rats and Mice:

Norway Rat: Burrows, mostly
Roof Rat: Walls, Attics, Trees
House Mouse: Stored material

Litter Size and Frequency of Common Adult Rats and Mice:

Norway Rat: 8-12, 7 Litters per Year
Roof Rat: 6-8, 8 Litters per Year
House Mouse: 6-7, 8-10 Litters per Year

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