With over 1700 species, more than one-third of all mammals are rodents. From the jumping jerboa to the humungous capybara, What is a Rodent? gnaws through rodent myths to expose the facts about this often misunderstood group. Readers of all ages will be fascinated by: • the rodent family tree • a rodent's body and amazing teeth • homes underground and watery habitats • millions of mice and rats • many cousins from squirrels to prairie dogs • prickly quills, webbed feet, and fabulous fur • pet care tips