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A lab mouse
Generic mice characters, art by Bob M. Guthrie.

Rodents (from Latin rodere, "to gnaw"), are mammals of the order Rodentia, which are characterized by a single pair of continuously growing incisors in each of the upper and lower jaws.


Rodents comprise about 40% of all mammal species. They are native to all major land masses except for New Zealand, Antarctica, and several oceanic islands, though they have subsequently been introduced to most of these land masses by human activity.

Rodent species[edit]

Rodent is the naming term of all members of Rodentia order of mammals and can be identified by their teeth. Their incisors (upper and lower) grow throughout their lives. Gnawing on hard material keeps the teeth worn down and sharp. Lagomorphs such as rabbits and hares are often mistaken for rodents. These animals have an additional pair of upper incisors that rodents lack.

The following is a short list of some common rodents:

See also[edit]

External links[edit]

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