
Mammal
North American Beaver
Nature's engineer of wetlands
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| Animal | Weight | Length | Top speed | Lifespan | Native to | Status |
|---|---|---|---|---|---|---|
| North American Beaver Castor canadensis | 25 kg | 1 m | 55 km/h | 20 yrs | North America | Least Concern |
| Hamster Mesocricetus auratus | 150 g | 17 cm | 8 km/h | 3 yrs | Asia | Domesticated |
| Guinea Pig Cavia porcellus | 1 kg | 25 cm | 8 km/h | 7 yrs | South America | Domesticated |
| Chinchilla Chinchilla lanigera | 500 g | 30 cm | 15 km/h | 15 yrs | South America | Endangered |
| Brown Lemming Lemmus lemmus | 80 g | 15 cm | 8 km/h | 2 yrs | Asia, Europe, North America | Least Concern |
| Black-tailed Prairie Dog Cynomys ludovicianus | 1.5 kg | 40 cm | 24 km/h | 8 yrs | North America | Least Concern |
| Muskrat Ondatra zibethicus | 1.2 kg | 35 cm | 5 km/h | 4 yrs | Asia, Europe, North America | Least Concern |
| Groundhog Marmota monax | 5 kg | 65 cm | 16 km/h | 6 yrs | North America | Least Concern |
| North American Porcupine Erethizon dorsatum | 9 kg | 80 cm | 3 km/h | 18 yrs | North America | Least Concern |
| Northern Flying Squirrel Glaucomys sabrinus | 150 g | 30 cm | 30 km/h | 6 yrs | North America | Least Concern |
| Squirrel Sciurus carolinensis | 550 g | 28 cm | 32 km/h | 6 yrs | North America, Europe | Least Concern |
| Mouse Mus musculus | 20 g | 9 cm | 13 km/h | 3 yrs | Asia | Least Concern |
| Capybara Hydrochoerus hydrochaeris | 55 kg | 1.2 m | 35 km/h | 9 yrs | South America | Least Concern |
| Rat Rattus norvegicus | 500 g | 25 cm | 13 km/h | 3 yrs | Asia | Least Concern |
| Chipmunk Tamias striatus | 100 g | 28 cm | 33 km/h | 8 yrs | North America | Least Concern |
| Xerus Xerus inauris | 700 g | 45 cm | 30 km/h | 6 yrs | Africa | Least Concern |
Figures are typical adult maxima from each profile; follow a profile for ranges, sources and context.

Mammal
Nature's engineer of wetlands

Mammal
The classic pocket-sized pet rodent

Mammal
The gentle social rodent from the Andes

Mammal
The soft-furred rodent of the Andes

Mammal
The tundra rodent of myth

Mammal
The keystone burrower of the plains

Mammal
North America's pond-building rodent

Mammal
North America's weather-watching marmot

Mammal
The quilled climber of northern forests

Mammal
North America's gliding rodent

Mammal
The agile, tree-climbing rodent of parks and woods

Mammal
The world's most widespread small rodent

Mammal
The world's largest rodent

Mammal
The clever, adaptable rodent that lives everywhere humans do

Mammal
The striped, cheek-stuffing squirrel of North America

Mammal
The African ground squirrel that shades itself with its tail