Rodents

The largest family of mammals is Rodentia, or the rodents. Rodent means gnawing animal, and these animals are so named because of their large incisor teeth and the way they eat. The two long pairs of incisors are used like chisels to gnaw on hard foods like nuts and wood. Their incisors grow continuously and must be worn down by gnawing.

There are three major types of rodent: squirrels, mice, and porcupines.