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Rodents, members of Rodentia, are an order of mammals characterized by a single pair of continuously growing incisors in each of the upper and lower jaws. About 40% of all mammals are rodents, and they are the most diversified mammalian order, living in a variety of habitats, including human-made environments.

Their distinguishing incisors do not stop growing, so the animal must continue to wear them down so that they do not pierce the skull. A gap, or diastema, occurs between the incisors and the cheek teeth in most species, allowing rodents to suck in their cheeks or lips to shield their mouth and throat from wood shavings and other inedible material, discarding it later. Rodents generally have well-developed senses of smell, hearing, and vision, with nocturnal species often having enlarged eyes. Many species have long, sensitive whiskers or vibrissae for touch or "whisking".

While the largest species, the capybara, can weigh as much as 146 lb, most rodents weigh less than 100 g. Rodents have wide-ranging body forms, but typically have squat bodies with short limbs. The nails of burrowing species tend to be long and strong, while arboreal rodents have shorter, sharper nails. Rodent species use a wide variety of methods of locomotion including quadrupedal walking, running, burrowing, climbing, bipedal hopping, swimming and even gliding. The majority of rodents have tails, which can be of many shapes and sizes. Some tails are prehensile, and the fur on the tails can vary from bushy to completely bald. Some have vestigial tails or no tails at all.

General anatomy

• buckteeth
• claws
• long claws
• sharp claws
• fur
• tail
• fluffy tail
• prehensile tail
• rat tail
• whiskers

Subfamilies, genera, and species

More information:

https://en.wikipedia.org/wiki/Rodent

Other rankings

• tag group:species
• mammal
• afrosoricid - Golden mole and tenrec.
• bovid - Buffalo, cattle, yak, etc.
• camelid - Alpaca, camel, llama, etc.
• canid - Dog, fox, wolf, etc.
• caprine - Goat, ibex, sheep, etc.
• cervid - Elk, moose, reindeer, etc.
• cetacean - Dolphin, porpoise, whale, etc.
• equid - Donkey, horse, zebra, etc.
• eulipotyphlan - Hedgehog, mole, shrew, etc.
• euplerid - Fanaloka, fossa, vontsira, etc.
• felid - Cat, lion, tiger, etc.
• giraffid - Giraffe, okapi, etc.
• herpestid - Mongoose
• hyaenid - Hyenas
• lagomorph - Rabbit, hare, pika, etc.
• marsupial - Kangaroo, koala, opossum, etc.
• mephitid - Skunks and stink badgers.
• monotreme - Echidna and platypus
• mustelid - Ferret, otter, weasel, etc.
• pinniped - Sea lion, seal, walrus, etc.
• primate - Ape, lemur, monkey, etc. (excludes human)
• proboscidean - Elephant, mammoth, mastodon, etc.
• procyonid - Kinkajou, raccoon, ring-tailed cat, etc.
• rodent - Mouse, rat, squirrel, etc.
• suina - Boar, pig, warthog, etc.
• ursid - Grizzly bear, panda, polar bear, etc.
• viverrid - Civet, genet, linsang, etc.
• xenarthran - Anteater, armadillo, and sloth.