Ages 6 to 12 years. With over 1700 species, over one-third of all mammals are rodents. From the jumping jerboa to the massive capybara, this book 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.