plural noun: rodents

A gnawing mammal of an order that includes rats, mice, squirrels, hamsters, porcupines, and their relatives, distinguished by strong constantly growing incisors and no canine teeth. They constitute the largest order of mammals. (Google Definitions) 

Rodents constitute some of the most successful mammals on earth, here in the UK the rodents that become pests are most likely to be rats and mice. The house mouse is the second most prevalent mammal on the planet, No.1 being homo sapiens, and can be found in almost any climate. Rats can jump 50cm vertically from a standstill and can fall 5 stories without causing themselves any harm.
Grey squirrels are also rodent pests common to the UK and can be found under the urban wildlife tab, introduced intentionally into the UK from America, they quickly pushed the native red squirrel population into decline.
Find out more about different types of rodents by clicking on their names.