Rodent

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Rodent

Rodent (/ˈroʊdənt/; from Latin rodere, 'to gnaw') is a group of mammals characterized by two continuously growing incisors in the upper and lower jaws which must be kept short by gnawing.

Etymology

The term "rodent" comes from the Latin rodere, meaning 'to gnaw'. This is in reference to a characteristic feature of rodents – their two continuously growing incisors.

Classification

Rodents are classified in the order Rodentia, which is further divided into suborders, families, and genera. Some of the most well-known families include Muridae (mice and rats), Sciuridae (squirrels), and Caviidae (guinea pigs).

Characteristics

Rodents are characterized by their two continuously growing incisors in the upper and lower jaws. These incisors have hard enamel on the front and softer dentine behind, allowing the teeth to maintain a sharp edge as they are worn down by gnawing. Other characteristics include a typically robust body, short limbs, and a long tail.

Behavior

Rodents are known for their ability to adapt to different environments and their behavior varies greatly depending on the species. Some rodents, like squirrels, are diurnal while others, like rats and mice, are nocturnal. Many rodents are also social animals, living in large colonies.

Related Terms

  • Incisor: One of the front teeth present in most mammals, used for cutting and gnawing.
  • Gnaw: To bite or chew on with the teeth, especially persistently.
  • Mammal: A warm-blooded vertebrate animal of a class that is distinguished by the possession of hair or fur, the secretion of milk by females for the nourishment of the young, and (typically) the birth of live young.
  • Muridae: The largest family of rodents and of mammals, containing over 700 species found naturally throughout Eurasia, Africa, and Australia.
  • Sciuridae: A family that includes small or medium-size rodents, including squirrels, chipmunks, and prairie dogs.
  • Caviidae: A family of rodents native to South America, including the domestic guinea pig, wild cavies, and capybaras, among others.

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