Please note that the content of this book primarily consists of articles
available from Wikipedia or other free sources online. Rodentia is an
order of mammals also known as rodents, characterised by two
continuously growing incisors in the upper and lower jaws which must be
kept short by gnawing.Forty percent of mammal species are rodents, and
they are found in vast numbers on all continents other than Antarctica.
Common rodents include mice, rats, squirrels, porcupines, beavers,
chipmunks, guinea pigs, and voles.Rodents have sharp incisors that they
use to gnaw wood, break into food, and bite predators. Most eat seeds or
plants, though some have more varied diets. Some species have
historically been pests, eating seeds stored by peopleand spreading
disease.
