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Introduction

Rats and mice belong to the largest of all mammal groups - the rodents. In fact, 43% of all mammal species worldwide are rodents.

Photo of a norway rat against a blurry gray/brown background.
Is it a mouse? A rat? Read on to find out how to tell!  Photo: NYSIPM. Click photo to see enlarged version.

Only a small number of rodent species are a problem in and around structures, where they may feed on human food and nest within our structures. Mice and rats can contaminate food, chew on wires and possibly cause fires, damage structures, and most importantly, carry pathogens linked to human illness. Therefore, when a rodent shows up in your home or office, it’s not just a mouse, but a potential health risk.